The water organ or hydraulic organ ( el, ὕδραυλις) (early types are sometimes called hydraulos, hydraulus or hydraula) is a type of

pipe organ The pipe organ is a musical instrument that produces sound by driving pressurized air (called ''wind'') through the organ pipes selected from a keyboard. Because each pipe produces a single pitch, the pipes are provided in sets called ''ranks ...

blown by air, where the power source pushing the air is derived by water from a natural source (e.g. by a

waterfall A waterfall is a point in a river or stream where water flows over a vertical drop or a series of steep drops. Waterfalls also occur where meltwater drops over the edge of a tabular iceberg or ice shelf. Waterfalls can be formed in several wa ...

) or by a manual pump. Consequently, the water organ lacks a

bellows A bellows or pair of bellows is a device constructed to furnish a strong blast of air. The simplest type consists of a flexible bag comprising a pair of rigid boards with handles joined by flexible leather sides enclosing an approximately airtigh ...

, blower, or

compressor A compressor is a mechanical device that increases the pressure of a gas by reducing its volume. An air compressor is a specific type of gas compressor. Compressors are similar to pumps: both increase the pressure on a fluid and both can transp ...

. The hydraulic organ is often confused with the hydraulis. The hydraulis is the name of a Greek instrument created by

Ctesibius of Alexandria Ctesibius or Ktesibios or Tesibius ( grc-gre, Κτησίβιος; fl. 285–222 BC) was a Greek inventor and mathematician in Alexandria, Ptolemaic Egypt. He wrote the first treatises on the science of compressed air and its uses in pumps (a ...

. The hydraulis has a reservoir of air which is inserted into a cistern of water. The air is pushed into the reservoir with hand pumps, and exits the reservoir as pressurized air to blow through the pipes. The reservoir is open on the bottom, allowing water to maintain the pressure on the air as the air supply fluctuates from either the pumps pushing more air in, or the pipes letting air out. On the water organ, since the 15th century, the water is also used as a source of power to drive a mechanism similar to that of the

barrel organ A barrel organ (also called roller organ or crank organ) is a French mechanical musical instrument consisting of bellows and one or more ranks of pipes housed in a case, usually of wood, and often highly decorated. The basic principle is the sam ...

, which has a pinned barrel that contains a specific song to be played. The hydraulis in ancient Greek is often imagined as an automatic organ, but there is no source evidence for it.

Hydraulis

A hydraulis is an early type of

that operated by converting the dynamic energy of water ( grc, ὕδωρ, húdōr) into air pressure to drive the pipes ( grc, αὐλός, aulós). Hence its name hydraulis, literally "water (driven) pipe (instrument)." It is attributed to the

Hellenistic In Classical antiquity, the Hellenistic period covers the time in Mediterranean history after Classical Greece, between the death of Alexander the Great in 323 BC and the emergence of the Roman Empire, as signified by the Battle of Actium in ...

scientist

, an engineer of the 3rd century

BCE Common Era (CE) and Before the Common Era (BCE) are year notations for the Gregorian calendar (and its predecessor, the Julian calendar), the world's most widely used calendar era. Common Era and Before the Common Era are alternatives to the or ...

. The hydraulis was the world's first keyboard instrument and was the predecessor of the modern church organ. Unlike the instrument of the

Renaissance The Renaissance ( , ) , from , with the same meanings. is a period in European history marking the transition from the Middle Ages to modernity and covering the 15th and 16th centuries, characterized by an effort to revive and surpass ideas ...

period, which is the main subject of the article on the pipe organ, the ancient hydraulis was played by hand, not automatically by the water-flow; the keys were balanced and could be played with a light touch, as is clear from the reference in a Latin poem by

Claudian Claudius Claudianus, known in English as Claudian (; c. 370 – c. 404 AD), was a Latin poet associated with the court of the Roman emperor Honorius at Mediolanum (Milan), and particularly with the general Stilicho. His work, written almost ent ...

(late 4th century), who uses this very phrase (''magna levi detrudens murmura tactu . . . intonet'', “let him thunder forth as he presses out mighty roarings with a light touch”) (''Paneg. Manlio Theodoro,'' 320–22).

Mechanics

Typically, water is supplied from some height above the instrument through a pipe, and air is introduced into the water stream by aspiration (using the

Bernoulli effect In fluid dynamics, Bernoulli's principle states that an increase in the speed of a fluid occurs simultaneously with a decrease in static pressure or a decrease in the fluid's potential energy. The principle is named after the Swiss mathemat ...

) into the main pipe from a side-pipe holding its top above the water source. Both water and air arrive together in the ''camera aeolis'' (wind chamber). Here, water and air separate and the compressed air is driven into a wind-trunk on top of the camera aeolis, to blow the organ pipes. Two perforated ‘splash plates’ or ‘diaphragms’ prevent water spray from getting into the organ pipes. The water, having been separated from the air, leaves the '' camera aeolis'' at the same rate as it enters. It then drives a water wheel, which in turn drives the musical cylinder and the movements attached. To start the organ, the tap above the entry pipe is turned on and, given a continuous flow of water, the organ plays until the tap is closed again. Many water organs had simple water-pressure regulating devices. At the

Palazzo del Quirinale The Quirinal Palace ( it, Palazzo del Quirinale ) is a historic building in Rome, Italy, one of the three current official residences of the president of the Italian Republic, together with Villa Rosebery in Naples and the Tenuta di Castelporzia ...

, the water flows from a hilltop spring (once abundant, now only sufficient to play the organ for about 30 minutes at a time), coursing through the palace itself into a stabilizing ‘room’ some 18 metres (59 feet) above the ''camera aeolis'' in the organ grotto. This drop provides sufficient wind to power the restored six-stop instrument. Among

writers on the water organ,

Salomon de Caus Salomon de Caus (1576, Dieppe – 1626, Paris) was a French Huguenot engineer, once (falsely) credited with the development of the steam engine. Biography Caus was the elder brother of Isaac de Caus. Being a Huguenot, Caus spent his life moving a ...

is particularly informative. His book of 1615 includes a short treatise on making water organs, advice on tuning and registration, and many fine engravings showing the instruments, their mechanisms and scenes in which they were used. It also includes an example of suitable music for water organ, the madrigal ''Chi farà fed' al cielo'' by

Alessandro Striggio Alessandro Striggio (c. 1536/1537 – 29 February 1592) was an Italian composer, instrumentalist and diplomat of the Renaissance. He composed numerous madrigals as well as dramatic music, and by combining the two, became the inventor of madrigal c ...

, arranged by

Peter Philips Peter Philips (also ''Phillipps'', ''Phillips'', ''Pierre Philippe'', ''Pietro Philippi'', ''Petrus Philippus''; ''c.''1560–1628) was an eminent English composer, organist, and Catholic priest exiled to Flanders. He was one of the greatest ke ...

History

Water organs were described in the numerous writings of the famous

Ctesibius Ctesibius or Ktesibios or Tesibius ( grc-gre, Κτησίβιος; fl. 285–222 BC) was a Greek inventor and mathematician in Alexandria, Ptolemaic Egypt. He wrote the first treatises on the science of compressed air and its uses in pumps (a ...

(3rd century BCE),

Philo of Byzantium Philo of Byzantium ( el, , ''Phílōn ho Byzántios'', ca. 280 BC – ca. 220 BC), also known as Philo Mechanicus, was a Greek engineer, physicist and writer on mechanics, who lived during the latter half of the 3rd century BC. Although he was f ...

(3rd century BCE) and

Hero of Alexandria Hero of Alexandria (; grc-gre, Ἥρων ὁ Ἀλεξανδρεύς, ''Heron ho Alexandreus'', also known as Heron of Alexandria ; 60 AD) was a Greece, Greek mathematician and engineer who was active in his native city of Alexandria, Roman Egy ...

( CE). Like the

water clock A water clock or clepsydra (; ; ) is a timepiece by which time is measured by the regulated flow of liquid into (inflow type) or out from (outflow type) a vessel, and where the amount is then measured. Water clocks are one of the oldest time-m ...

s (clepsydra) of Plato's time, they were not regarded as playthings but might have had a particular significance in Greek philosophy, which made use of models and simulacra of this type. Hydraulically blown organ pipes were used to imitate birdsong, and musicologists

Susi Jeans Susi may refer to: *933 Susi, a minor planet orbiting the Sun *Susi Air, an Indonesian airline *Sydney University Stellar Interferometer, an optical interferometer in Sydney, Australia People Given name *Susi Erdmann (born 1968), German luger and ...

and Arthur W.J.G. Ord-Hume have suggested that it was used to create the sounds of the Vocal Memnon.Jeans, Susi and Ord-Hume, Arthur W.J.G. "Water organ". L. Macy (Ed.),
Grove Music Online
'' (subscription required). Retrieved on 2006-11-28. For the latter, solar heat was used to syphon water from one closed tank into another, thereby producing compressed air for sounding the pipes. Characteristics of the hydraulis have been inferred from mosaics, paintings, literary references, and partial remains. In 1931, the remains of a hydraulis were discovered in

Hungary Hungary ( hu, Magyarország ) is a landlocked country in Central Europe. Spanning of the Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Croatia a ...

, with an inscription dating it to 228 CE. The leather and wood of the instrument had decomposed, but the surviving metal parts made it possible to reconstruct a working replica now in the Aquincum Museum in

Budapest Budapest (, ; ) is the capital and most populous city of Hungary. It is the ninth-largest city in the European Union by population within city limits and the second-largest city on the Danube river; the city has an estimated population ...

. The exact mechanism of wind production is debated, and almost nothing is known about the music played on the hydraulis, but the tone of the pipes can be studied. The

Talmud The Talmud (; he, , Talmūḏ) is the central text of Rabbinic Judaism and the primary source of Jewish religious law (''halakha'') and Jewish theology. Until the advent of modernity, in nearly all Jewish communities, the Talmud was the cente ...

mentions the instrument as not appropriate for the

Jerusalem Temple The Temple in Jerusalem, or alternatively the Holy Temple (; , ), refers to the two now-destroyed religious structures that served as the central places of worship for Israelites and Jews on the modern-day Temple Mount in the Old City of Jerusa ...

After its invention by the Greeks, the hydraulis continued to be used through antiquity in the Roman world. In the Middle Ages, Eastern Roman (Byzantine) Empire,

Medieval Europe In the history of Europe, the Middle Ages or medieval period lasted approximately from the late 5th to the late 15th centuries, similar to the post-classical period of global history. It began with the fall of the Western Roman Empire a ...

and Muslim world further developed these instruments. A well-known instance of an early positive or

portable organ A portative organ (from the Latin verb , "to carry"), also known during Italian Trecento as the , is a small pipe organ that consists of one rank of flue pipes, sometimes arranged in two rows, to be played while strapped to the performer at a ...

of the 4th century occurs on the

obelisk An obelisk (; from grc, ὀβελίσκος ; diminutive of ''obelos'', " spit, nail, pointed pillar") is a tall, four-sided, narrow tapering monument which ends in a pyramid-like shape or pyramidion at the top. Originally constructed by Anc ...

erected to the memory of

Theodosius I Theodosius I ( grc-gre, Θεοδόσιος ; 11 January 347 – 17 January 395), also called Theodosius the Great, was Roman emperor from 379 to 395. During his reign, he succeeded in a crucial war against the Goths, as well as in two ...

on his death in 395 CE. Among the

illuminated manuscripts An illuminated manuscript is a formally prepared document where the text is often supplemented with flourishes such as borders and miniature illustrations. Often used in the Roman Catholic Church for prayers, liturgical services and psalms, the ...

of the British Museum there are many miniatures representing interesting varieties of the portable organ of the

Middle Ages In the history of Europe, the Middle Ages or medieval period lasted approximately from the late 5th to the late 15th centuries, similar to the post-classical period of global history. It began with the fall of the Western Roman Empire a ...

used in European churches. The ''Pippin's organ of 757'' was a hydraulic organ sent as a gift to the

Carolingian empire The Carolingian Empire (800–888) was a large Frankish-dominated empire in western and central Europe during the Early Middle Ages. It was ruled by the Carolingian dynasty, which had ruled as kings of the Franks since 751 and as kings of the Lom ...

by the

Byzantine The Byzantine Empire, also referred to as the Eastern Roman Empire or Byzantium, was the continuation of the Roman Empire primarily in its eastern provinces during Late Antiquity and the Middle Ages, when its capital city was Constantinopl ...

emperor

Constantine V Constantine V ( grc-gre, Κωνσταντῖνος, Kōnstantīnos; la, Constantinus; July 718 – 14 September 775), was Byzantine emperor from 741 to 775. His reign saw a consolidation of Byzantine security from external threats. As an able ...

. A long-distance hydraulic organ that could be heard from sixty miles away was described in

Arabic Arabic (, ' ; , ' or ) is a Semitic languages, Semitic language spoken primarily across the Arab world.Semitic languages: an international handbook / edited by Stefan Weninger; in collaboration with Geoffrey Khan, Michael P. Streck, Janet C ...

texts and attributed to an ancient Greek figure called Muristus; this individual's identity is unknown, but is sometimes suggested to be an Arabized version of the name Ctesibius. By the end of the 12th century hydraulic automata were often seen in Italy and the rest of Western Europe. During the Renaissance, water organs again acquired magical and metaphysical connotations among followers of the hermetic and esoteric sciences. Organs were placed in gardens,

grotto A grotto is a natural or artificial cave used by humans in both modern times and antiquity, and historically or prehistorically. Naturally occurring grottoes are often small caves near water that are usually flooded or often flooded at high ti ...

es and conservatories of royal palaces and the mansions of rich patricians to delight onlookers not only with music but also with displays of automata – dancing figurines, wing-flapping birds and hammering

cyclopes In Greek mythology and later Roman mythology, the Cyclopes ( ; el, Κύκλωπες, ''Kýklōpes'', "Circle-eyes" or "Round-eyes"; singular Cyclops ; , ''Kýklōps'') are giant one-eyed creatures. Three groups of Cyclopes can be distinguish ...

– all operated by projections on the musical cylinder. Other types of water organ were played out of sight and were used to simulate musical instruments apparently being played by statues in mythological scenes such as '

Orpheus Orpheus (; Ancient Greek: Ὀρφεύς, classical pronunciation: ; french: Orphée) is a Thracian bard, legendary musician and prophet in ancient Greek religion. He was also a renowned poet and, according to the legend, travelled with Jaso ...

playing the

viol The viol (), viola da gamba (), or informally gamba, is any one of a family of bowed, fretted, and stringed instruments with hollow wooden bodies and pegboxes where the tension on the strings can be increased or decreased to adjust the pitc ...

', 'The contest between

Apollo Apollo, grc, Ἀπόλλωνος, Apóllōnos, label=genitive , ; , grc-dor, Ἀπέλλων, Apéllōn, ; grc, Ἀπείλων, Apeílōn, label=Arcadocypriot Greek, ; grc-aeo, Ἄπλουν, Áploun, la, Apollō, la, Apollinis, label= ...

and

Marsyas In Greek mythology, the satyr Marsyas (; grc-gre, Μαρσύας) is a central figure in two stories involving music: in one, he picked up the double oboe (''aulos'') that had been abandoned by Athena and played it; in the other, he challenged ...

' and 'Apollo and the nine

Muses In ancient Greek religion and mythology, the Muses ( grc, Μοῦσαι, Moûsai, el, Μούσες, Múses) are the inspirational goddesses of literature, science, and the arts. They were considered the source of the knowledge embodied in the p ...

'. The most famous water organ of the 16th century was at the

Villa d'Este The Villa d'Este is a 16th-century villa in Tivoli, near Rome, famous for its terraced hillside Italian Renaissance garden and especially for its profusion of fountains. It is now an Italian state museum, and is listed as a UNESCO World Herita ...

in Tivoli. Built about 1569–1572 by Lucha Clericho (

Luc de Clerc Luc or LUC may refer to: Places * Luc, Hautes-Pyrénées, France, a commune * Luc, Lozère, France, a commune * Le Luc, France, a commune * Luč, Baranja, Croatia, a settlement People and fictional characters * Luc (given name) * Luc (surname) ...

; completed by Claude Venard), it stood about six metres high under an arch, and was fed by a magnificent waterfall; it was described by Mario Cartaro in 1575 as playing '

madrigals A madrigal is a form of secular vocal music most typical of the Renaissance (15th–16th c.) and early Baroque (1600–1750) periods, although revisited by some later European composers. The polyphonic madrigal is unaccompanied, and the number ...

and many other things'. G. M. Zappi (Annalie memorie de Tivoli, 1576) wrote: 'When somebody gives the order to play, at first one hears trumpets which play a while and then there is a consonance …. Countless gentlemen could not believe that this organ played by itself, according to the registers, with water, but they rather thought that there was somebody inside'. Besides automatically playing at least three pieces of music, it is now known that the organ was also provided with a keyboard. Other Italian gardens with water organs were at

Pratolino The Villa di Pratolino was a Renaissance patrician villa in Vaglia, Tuscany, Italy. It was mostly demolished in 1822. Its remains are now part of the Villa Demidoff, 12 km north of Florence, reached from the main road to Bologna. History Th ...

, near Florence (), Isola de Belvedere,

Ferrara Ferrara (, ; egl, Fràra ) is a city and ''comune'' in Emilia-Romagna, northern Italy, capital of the Province of Ferrara. it had 132,009 inhabitants. It is situated northeast of Bologna, on the Po di Volano, a branch channel of the main stream ...

(before 1599),

, Rome (built by Luca Biagi in 1598, restored 1990),

Villa Aldobrandini The Villa Aldobrandini is a villa in Frascati, Italy. It is still owned and lived in by the Aldobrandini family, and known as Belvedere for its location overlooking the valley toward the city of Rome. It is the only grand Pope, Papal garden not o ...

Frascati Frascati () is a city and ''comune'' in the Metropolitan City of Rome Capital in the Lazio region of central Italy. It is located south-east of Rome, on the Alban Hills close to the ancient city of Tusculum. Frascati is closely associated with ...

(1620), one of the Royal Palaces at Naples (1746),

Villa Doria Pamphili The Villa Doria Pamphili is a seventeenth-century villa with what is today the largest landscaped public park in Rome, Italy. It is located in the quarter of Monteverde (Rome), Monteverde, on the ''Gianicolo'' (or the Roman Janiculum), just outsid ...

, Rome (1758–1759). Of these only the one at the Palazzo del Quirinale has survived. Kircher's illustration in ''

Musurgia universalis ''Musurgia Universalis, sive Ars Magna Consoni et Dissoni'' ("The Universal Musical Art, of the Great Art of Consonance and Dissonance") is a 1650 work by the Jesuit scholar Athanasius Kircher. It was printed in Rome by Ludovico Grignani and dedi ...

'' (1650), long thought to be a fanciful representation of a hypothetical possibility, has been found to be accurate in every detail when compared to the organ grotto at the Quirinale, except that it was reversed left to right. There are still traces of the instrument at the Villa d'Este but the mineral-rich water of the river which cascades through the organ grotto has caused accretions which have hidden most of the evidence from view. In the early 17th century, water organs were built in England;

Cornelius Drebbel Cornelis Jacobszoon Drebbel ( ) (1572 – 7 November 1633) was a Dutch engineer and inventor. He was the builder of the first operational submarine in 1620 and an innovator who contributed to the development of measurement and control systems, op ...

built one for King James I ( Harstoffer, 1651), and

built several at Richmond while in the service of Prince Henry. There was one in Bagnigge Vale, London, the summer home of

Nell Gwynn Eleanor Gwyn (2 February 1650 – 14 November 1687; also spelled ''Gwynn'', ''Gwynne'') was a celebrity figure of the Restoration period. Praised by Samuel Pepys for her comic performances as one of the first actresses on the English stag ...

(1650–1687), and

Henry Winstanley Henry Winstanley (31 March 1644 – 27 November 1703) was an English painter, engineer and merchant, who constructed the first Eddystone lighthouse after losing two of his ships on the Eddystone rocks. He died while working on the project duri ...

(1644–1703), the designer of the

Eddystone Lighthouse The Eddystone Lighthouse is a lighthouse that is located on the dangerous Eddystone Rocks, south of Rame Head in Cornwall, England. The rocks are submerged below the surface of the sea and are composed of Precambrian gneiss. View at 1:50000 ...

, is thought to have built one at his home in

Saffron Walden Saffron Walden is a market town in the Uttlesford district of Essex, England, north of Bishop's Stortford, south of Cambridge and north of London. It retains a rural appearance and some buildings of the medieval period. The population was 15, ...

, Essex. After the marriage of Princess Elizabeth to the Elector Palatine Prince Friedrich V, de Caus laid out for them the gardens at

Heidelberg Castle Heidelberg Castle (german: Heidelberger Schloss) is a ruin in Germany and landmark of Heidelberg. The castle ruins are among the most important Renaissance structures north of the Alps. The castle has only been partially rebuilt since its demoli ...

which became famous for their beautiful and intricate waterworks. A water organ survives in the gardens at

Heilbronn Heilbronn () is a List of cities and towns in Germany, city in northern Baden-Württemberg, Germany, surrounded by Heilbronn (district), Heilbronn District. With over 126,000 residents, it is the sixth-largest city in the state. From the late Mid ...

Württemberg Württemberg ( ; ) is a historical German territory roughly corresponding to the cultural and linguistic region of Swabia. The main town of the region is Stuttgart. Together with Baden and Hohenzollern, two other historical territories, Würt ...

, and parts of one at the Wilhelmshöhe gardens in

Kassel Kassel (; in Germany, spelled Cassel until 1926) is a city on the Fulda River in northern Hesse, Germany. It is the administrative seat of the Regierungsbezirk Kassel and the district of the same name and had 201,048 inhabitants in December 2020 ...

. The brothers Francini constructed waterworks and organs at

Saint Germain-en-Laye Saint-Germain-en-Laye () is a commune in the Yvelines department in the Île-de-France in north-central France. It is located in the western suburbs of Paris, from the centre of Paris. Inhabitants are called ''Saint-Germanois'' or ''Saint-Ge ...

and

Versailles The Palace of Versailles ( ; french: Château de Versailles ) is a former royal residence built by King Louis XIV located in Versailles, about west of Paris, France. The palace is owned by the French Republic and since 1995 has been managed, u ...

, which reached new heights of splendour and extravagance. By the end of the 17th century, however, interest in water organs had waned. As their upkeep was costly they were left to decay and were soon forgotten; by 1920 not one survived (the so-called water organ at Hellbrunn Castle, Salzburg, is a pneumatic organ driven by hydraulically operated bellows). Their mechanism was subsequently misunderstood until the Dutch engineer Van Dijk pointed out in 1954 that air was supplied to the water organ by aspiration, which was the same method used in forges and smelting works in the 16th and 17th centuries. Aspiration is the process by which air is drawn into an opening into which water flows. For the water organ, a small pipe is arranged so that one end is open to the air and the other extends into a larger pipe that contains flowing water supplied by a stream, pond or stabilizing reservoir. The longer the vertical drop of the water, the more forceful the suction will be and the greater the volume of air sucked in.

The hydraulis of Dion

In 1992, the remains of a 1st-century BCE pipe organ were found at Dion, an ancient Macedonian city near

Mount Olympus Mount Olympus (; el, Όλυμπος, Ólympos, also , ) is the highest mountain in Greece. It is part of the Olympus massif near the Thermaic Gulf of the Aegean Sea, located in the Olympus Range on the border between Thessaly and Macedonia, be ...

Greece Greece,, or , romanized: ', officially the Hellenic Republic, is a country in Southeast Europe. It is situated on the southern tip of the Balkans, and is located at the crossroads of Europe, Asia, and Africa. Greece shares land borders with ...

, during excavations under

Dimitrios Pandermalis Dimitrios Pandermalis ( el, Δημήτριος Παντερμαλής; 1940 – 14 September 2022) was a Greek archaeologist. He was professor of archaeology at the Aristotle University of Thessaloniki, supervisor of the Archaeological site of ...

. This instrument consisted of 24 open pipes of different height with a conical lower ending. The first 19 pipes have a height from 89 to 22 cm (35 to 8 inches). Their inner diameter gradually decreases from 2 to 1.5 cm. These 19 pipes correspond to the "''perfect system''" of the ancient Greek music which consisted of one chromatic and one diatonic scale. The pipes No. 20 to 24 are smaller and almost equal in height and they seem to form an extension of the diatonic scale. The conical end of the pipes is inserted in a metal plate. At a point just before the narrowing part of every pipe there is an opening producing the turbulence of the pressurized air and the sound. The pipes are stabilized by two metal plates. The one facing outwards has decorative motifs. The instrument had one row of keys. The lower part of the organ, with the air-pressing system, was missing. In 1995, a reconstruction project started, and by 1999 a working replica of hydraulis was made based on the archaeological finding and on ancient descriptions. The remains of the ancient hydraulis are exhibited at the

Archaeological Museum of Dion The Archaeological Museum of Dion ( el, Αρχαιολογικό Μουσείο Δίου) is a museum in Dion, Greece, Dion in the Pieria (regional unit), Pieria regional unit of Central Macedonia, Greece. The museum was established in 1983 to dis ...

Notes

References

Reconstruction of a Roman hydraulis by Justus Willberg and Martin Braun

Musica Romana: Ensemble for ancient music

* ttps://web.archive.org/web/20090418035545/http://www.westfield.org/curious.htm Curious facts from the organ's history
ACM Multimedia 2005 paper on the hydraulophone

External links

Hydraulis video
(click "The Ancient Hydraulis" in the second paragraph to watch)
A Bach piece being played on a hydraulophone pipe organ (video)

Dead link Death is the irreversible cessation of all biological functions that sustain an organism. For organisms with a brain, death can also be defined as the irreversible cessation of functioning of the whole brain, including brainstem, and brain ...

{{DEFAULTSORT:Water Organ Ancient Greek musical instruments Ancient Roman musical instruments Greek inventions Hellenistic engineering Organs (music) Pipe organ Ancient inventions Organ