The Gaianum was an area in the Transtiberim in

ancient Rome In modern historiography, ancient Rome refers to Roman civilisation from the founding of the city of Rome in the 8th century BC to the collapse of the Western Roman Empire in the 5th century AD. It encompasses the Roman Kingdom (753–509 B ...

. It is located in Regio XIV, about 300m northwest of the

Mausoleum of Hadrian The Mausoleum of Hadrian, usually known as Castel Sant'Angelo (; English: ''Castle of the Holy Angel''), is a towering cylindrical building in Parco Adriano, Rome, Italy. It was initially commissioned by the Roman Emperor Hadrian as a mausoleu ...

, south of the Naumachia Vaticana built by

Trajan Trajan ( ; la, Caesar Nerva Traianus; 18 September 539/11 August 117) was Roman emperor from 98 to 117. Officially declared ''optimus princeps'' ("best ruler") by the senate, Trajan is remembered as a successful soldier-emperor who presi ...

, and east of the

Via Triumphalis Via Trionfale is a Roman road that leads to and within Rome, Italy. Formerly called Via Triumphalis, it was an ancient consular road that connected Rome to Veii. The northern terminus of the road connects with the Via Cassia. History The name giv ...

. The historian

Cassius Dio Lucius Cassius Dio (), also known as Dio Cassius ( ), was a Roman historian and senator of maternal Greek origin. He published 80 volumes of the history on ancient Rome, beginning with the arrival of Aeneas in Italy. The volumes documented the ...

says that

Caligula Gaius Julius Caesar Augustus Germanicus (31 August 12 – 24 January 41), better known by his nickname Caligula (), was the third Roman emperor, ruling from 37 until his assassination in 41. He was the son of the popular Roman general Germanicu ...

, also commonly known in ancient sources as Gaius, used the Gaianum for chariot exercises. A number of victory statues have been found in the area, but seem to have been installed originally at the Circus of Gaius and Nero. The Gaianum was probably only a track, not a circus building as such. The

Calendar of Philocalus The ''Chronograph of 354'' (or "Chronography"), also known as the ''Calendar of 354'', is a compilation of chronological and calendrical texts produced in 354 AD for a wealthy Roman Christian named Valentinus by the calligrapher and illustrator ...

(354 AD) lists an ''Initium Caiani'' on March 28, at the conclusion of an Imperial-era religious festival for Cybele and Attis that began March 22. The older Republican

festival A festival is an event ordinarily celebrated by a community and centering on some characteristic aspect or aspects of that community and its religion or cultures. It is often marked as a local or national holiday, mela, or eid. A festival c ...

of the Megalesia for Cybele as ''Magna Mater'' ran April 4–10. The regionary catalogues connect the Gaianum to the Phrygianum, a sanctuary of the Magna Mater on the

Vatican Hill Vatican Hill (; la, Mons Vaticanus; it, Colle Vaticano) is a hill located across the Tiber river from the traditional seven hills of Rome, that also gave the name of Vatican City. It is the location of St. Peter's Basilica. Etymology The anc ...

. Some scholars think an initiation rite in connection with the cult was held on March 28, with the Gaianum substituting for the Phrygianum when it was made inaccessible by the construction of St. Peter's beginning in the early 4th century. March 28 was also the date of Caligula's entry ''(initium)'' into Rome in 37 AD, when he was acclaimed as '' princeps'', and the festival may originate with him, with no relation to the cult of Cybele.Duncan Fishwick, "The Cannophori and the March Festival of Magna Mater," ''Transactions of the American Philological Association'' 97 (1966), pp. 193–194.

References

Topography of the ancient city of Rome {{ancient-Rome-stub