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Ashlar () is finely dressed (cut, worked) stone, either an individual
stone
In geology, rock (or stone) is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its Chemical compound, chemical composition, and the way in which it is formed. Rocks ...
that has been worked until squared, or a structure built from such stones. Ashlar is the finest stone
masonry
Masonry is the building of structures from individual units, which are often laid in and bound together by mortar; the term ''masonry'' can also refer to the units themselves. The common materials of masonry construction are bricks, building ...
unit, generally rectangular
cuboid
In geometry, a cuboid is a hexahedron, a six-faced solid. Its faces are quadrilaterals. Cuboid means "like a cube", in the sense that by adjusting the length of the edges or the angles between edges and faces a cuboid can be transformed into a cub ...
, mentioned by
Vitruvius
Vitruvius (; c. 80–70 BC – after c. 15 BC) was a Roman architect and engineer during the 1st century BC, known for his multi-volume work entitled ''De architectura''. He originated the idea that all buildings should have three attribute ...
as
opus isodomum
''Opus isodomum'' ("work of equal height") is an ancient technique of wall construction with ashlars. It uses perfectly cut, completely regular squared stone blocks of equal height, and sometimes of the same length.
Etymology
''opus'', work + ''is ...
, or less frequently
trapezoid
A quadrilateral with at least one pair of parallel sides is called a trapezoid () in American and Canadian English. In British and other forms of English, it is called a trapezium ().
A trapezoid is necessarily a Convex polygon, convex quadri ...
al. Precisely cut "on all faces adjacent to those of other stones", ashlar is capable of very thin joints between blocks, and the visible face of the stone may be
quarry-faced or feature a variety of treatments: tooled, smoothly polished or rendered with another material for decorative effect.
One such decorative treatment consists of small grooves achieved by the application of a metal comb. Generally used only on softer stone ashlar, this decoration is known as "mason's drag".
Ashlar is in contrast to
rubble masonry
Rubble stone is rough, uneven building stone not laid in regular courses. It may fill the core of a wall which is faced with unit masonry such as brick or ashlar. Analogously, some medieval cathedral walls are outer shells of ashlar with an inn ...
, which employs irregularly shaped stones, sometimes minimally worked or selected for similar size, or both. Ashlar is related but distinct from other stone masonry that is finely dressed but not quadrilateral, such as curvilinear and
polygonal masonry
Polygonal masonry is a technique of stone wall construction. True polygonal masonry is a technique wherein the visible surfaces of the stones are dressed with straight sides or joints, giving the block the appearance of a polygon.
This techniqu ...
.
Ashlar may be
coursed, which involves lengthy horizontal layers of stone blocks laid in parallel, and therefore with continuous horizontal joints. Ashlar may also be random, which involves stone blocks laid with deliberately discontinuous courses and therefore discontinuous joints both vertically and horizontally. In either case, it generally uses a joining material such as
mortar to bind the blocks together, although
dry ashlar construction, metal ties, and other methods of assembly have been used. The dry ashlar of
Inca architecture
Inca architecture is the most significant pre-Columbian architecture in South America. The Incas inherited an architectural legacy from Tiwanaku, founded in the 2nd century B.C.E. in present-day Bolivia. A core characteristic of the architectur ...
in
Cusco
Cusco, often spelled Cuzco (; qu, Qusqu ()), is a city in Southeastern Peru near the Urubamba Valley of the Andes mountain range. It is the capital of the Cusco Region and of the Cusco Province. The city is the list of cities in Peru, seventh m ...
and
Machu Picchu
Machu Picchu is a 15th-century Inca citadel located in the Eastern Cordillera of southern Peru on a mountain range.UNESCO World Heritage Centre. It is located in the Machupicchu District within Urubamba Province above the Sacred Valley, which ...
is particularly fine and famous.
Etymology
The word is attested in
Middle English
Middle English (abbreviated to ME) is a form of the English language that was spoken after the Norman conquest of 1066, until the late 15th century. The English language underwent distinct variations and developments following the Old English p ...
and derives from the
Old French
Old French (, , ; Modern French: ) was the language spoken in most of the northern half of France from approximately the 8th to the 14th centuries. Rather than a unified language, Old French was a linkage of Romance dialects, mutually intelligib ...
''aisselier'', from the
Latin
Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...
''axilla'', a diminutive of ''axis'', meaning "plank". "Clene hewen ashler" often occurs in medieval documents; this means tooled or finely worked, in contradistinction to rough-axed faces.
Use
Ashlar blocks have been used in the construction of many buildings as an alternative to
brick
A brick is a type of block used to build walls, pavements and other elements in masonry construction. Properly, the term ''brick'' denotes a block composed of dried clay, but is now also used informally to denote other chemically cured cons ...
or other materials.
In
classical architecture
Classical architecture usually denotes architecture which is more or less consciously derived from the principles of Greek and Roman architecture of classical antiquity, or sometimes even more specifically, from the works of the Roman architect V ...
, ashlar wall surfaces were often contrasted with
rustication.
The term is frequently used to describe the dressed stone work of
prehistoric Greece and Crete, although the dressed blocks are usually much larger than modern ashlar. For example, the
''tholos'' tombs of
Bronze Age
The Bronze Age is a historic period, lasting approximately from 3300 BC to 1200 BC, characterized by the use of bronze, the presence of writing in some areas, and other early features of urban civilization. The Bronze Age is the second pri ...
Mycenae
Mycenae ( ; grc, Μυκῆναι or , ''Mykē̂nai'' or ''Mykḗnē'') is an archaeological site near Mykines in Argolis, north-eastern Peloponnese, Greece. It is located about south-west of Athens; north of Argos; and south of Corinth. Th ...
use ashlar masonry in the construction of the so-called "beehive" dome. This dome consists of finely cut ashlar blocks that decrease in size and terminate in a central
capstone
CAPSTONE (Cislunar Autonomous Positioning System Technology Operations and Navigation Experiment) is a lunar orbiter that will test and verify the calculated orbital stability planned for the Lunar Gateway space station. The spacecraft is a 12- ...
.
These domes are not true domes, but are constructed using the
corbel arch
A corbel arch (or corbeled / corbelled arch) is an arch-like construction method that uses the architectural technique of corbeling to span a space or void in a structure, such as an entranceway in a wall or as the span of a bridge. A corbel v ...
.
Ashlar masonry was also heavily used in the construction of palace facades on
Crete
Crete ( el, Κρήτη, translit=, Modern: , Ancient: ) is the largest and most populous of the Greek islands, the 88th largest island in the world and the fifth largest island in the Mediterranean Sea, after Sicily, Sardinia, Cyprus, and ...
, including
Knossos
Knossos (also Cnossos, both pronounced ; grc, Κνωσός, Knōsós, ; Linear B: ''Ko-no-so'') is the largest Bronze Age archaeological site on Crete and has been called Europe's oldest city.
Settled as early as the Neolithic period, the na ...
and
Phaistos
Phaistos ( el, Φαιστός, ; Ancient Greek: , , Minoan: PA-I-TO?http://grbs.library.duke.edu/article/download/11991/4031&ved=2ahUKEwjor62y3bHoAhUEqYsKHZaZArAQFjASegQIAhAB&usg=AOvVaw1MwIv3ekgX-SxkJrbORipd ), also transliterated as Phaestos, ...
. These constructions date to the
MM III-LM Ib period, c. 1700–1450 BC.
In modern European masonry the blocks are generally about in height. When shorter than , they are usually called small ashlar.
As metaphor
In some
Masonic
Freemasonry or Masonry refers to Fraternity, fraternal organisations that trace their origins to the local guilds of Stonemasonry, stonemasons that, from the end of the 13th century, regulated the qualifications of stonemasons and their inte ...
groupings, which such societies term
jurisdiction
Jurisdiction (from Latin 'law' + 'declaration') is the legal term for the legal authority granted to a legal entity to enact justice. In federations like the United States, areas of jurisdiction apply to local, state, and federal levels.
Jur ...
s, ashlars are used as a symbolic metaphor for how one's
personal development
Personal development or self improvement consists of activities that develop a person's capabilities and potential, build human capital, facilitate employability, and enhance quality of life and the realization of dreams and aspirations. Persona ...
relates to the tenets of their
lodge
Lodge is originally a term for a relatively small building, often associated with a larger one.
Lodge or The Lodge may refer to:
Buildings and structures Specific
* The Lodge (Australia), the official Canberra residence of the Prime Ministe ...
. As described in the explanation of the
First Degree Tracing Board, in
Emulation
Emulation may refer to:
*Emulation (computing), imitation of behavior of a computer or other electronic system with the help of another type of system
:*Video game console emulator, software which emulates video game consoles
*Gaussian process em ...
and other
Masonic ritual
Masonic ritual is the scripted words and actions that are spoken or performed during the degree work in a Masonic lodge. Masonic symbolism is that which is used to illustrate the principles which Freemasonry espouses. Masonic ritual has appeared ...
s the rough ashlar is a stone as taken directly from the quarry, and allegorically represents the Freemason prior to his initiation; a smooth ashlar (or "perfect ashlar") is a stone that has been smoothed and dressed by the experienced
stonemason
Stonemasonry or stonecraft is the creation of buildings, structures, and sculpture using stone as the primary material. It is one of the oldest activities and professions in human history. Many of the long-lasting, ancient shelters, temples, mo ...
, and allegorically represents the Freemason who, through education and diligence, has learned the lessons of Freemasonry and who lives an upstanding life.
See also
*
Ablaq
Ablaq ( ar, أبلق; particolored; literally 'piebald') is an architectural technique involving alternating or fluctuating rows of light and dark stone. Records trace the beginnings of this type of masonry technique to the southern parts of S ...
*
Dimension stone
Dimension stone is natural stone or rock that has been selected and finished (e.g., trimmed, cut, drilled, ground, or other) to specific sizes or shapes. Color, texture and pattern, and surface finish of the stone are also normal requirements. A ...
*
Opus quadratum
''Opus quadratum'' ("squared work") is an ancient Roman construction technique, in which squared blocks of stone of the same height were set in parallel courses, most often without the use of mortar. The Latin author Vitruvius describes the tech ...
*
Stone cladding
In geology, rock (or stone) is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition, and the way in which it is formed. Rocks form the Earth's o ...
*
Stone veneer
Stone veneer is a thin layer of any stone used as decorative facing material that is not meant to be load bearing. Stone cladding is a stone veneer, or simulated stone, applied to a building or other structure made of a material other than stone. S ...
References
External links
{{Native american styles
Building stone
Stonemasonry
Types of wall
Wallcoverings
Architectural elements
Garden features
Masonic symbolism