Tetrarch, Tetrarchs, or Tetrarchy may refer to: *

Tetrarchy The Tetrarchy was the system instituted by Roman emperor Diocletian in 293 AD to govern the ancient Roman Empire by dividing it between two emperors, the '' augusti'', and their juniors colleagues and designated successors, the '' caesares' ...

, the four co-emperors of the Roman Empire instituted by the Emperor Diocletian *

Portrait of the Four Tetrarchs The Portrait of the Four Tetrarchs is a porphyry sculpture group of four Roman emperors dating from around 300 AD. The sculptural group has been fixed to a corner of the façade of St Mark's Basilica in Venice, Italy since the Middle Ages. It ...

- a sculpture of the four co-emperors of the Roman Empire *

Herodian Tetrarchy The Herodian Tetrarchy was formed following the death of Herod the Great in 4 BCE, when his kingdom was divided between his sons Herod Archelaus as ethnarch, Herod Antipas and Philip as tetrarchs in inheritance, while Herod's sister Salome I brief ...

, formed by the sons of Herod the Great * Tetrarch, Military rank#Greek ranks in ancient Greek armies * ''Tetrarch'' (novel), a 2003 novel by Ian Irvine *

Light Tank Mk VII Tetrarch The Light Tank Mk VII (A17), also known as the Tetrarch, was a British light tank produced by Vickers-Armstrongs in the late 1930s and used during the Second World War. The Tetrarch was the latest in the line of light tanks built by the company ...

, a British light tank of World War II *

The Tetrarch The Tetrarch (1911–1935) was an Irish-bred, British-trained Thoroughbred racehorse. He was undefeated in a racing career of seven starts and was voted the best British-trained two-year-old of the 20th century according to the National Horse ...

, a Thoroughbred racehorse * The Tetrarchs of

Ancient Thessaly Thessaly or Thessalia (Attic Greek: , ''Thessalía'' or , ''Thettalía'') was one of the traditional regions of Ancient Greece. During the Mycenaean period, Thessaly was known as Aeolia, a name that continued to be used for one of the major tribes ...

under Philip II of Macedon * The Tetrarchs of

Galatia Galatia (; grc, Γαλατία, ''Galatía'', "Gaul") was an ancient area in the highlands of central Anatolia, roughly corresponding to the provinces of Ankara and Eskişehir, in modern Turkey. Galatia was named after the Gauls from Thrace (c ...

in Asia Minor * Tetrarches, a rank in the Byzantine army * ''Tetrarch'', a 1981 fantasy novel by

Alex Comfort Alexander Comfort (10 February 1920 – 26 March 2000) was a British scientist and physician known best for his nonfiction sex manual, ''The Joy of Sex'' (1972). He was an author of both fiction and nonfiction, as well as a gerontologist, ...

Tetrarch (band) Tetrarch is an American nu metal band from Atlanta, Georgia, United States. They are now located in Los Angeles. They have released three EPs and two albums. Their latest entitled ''Unstable'', was released in April 2021. History Formation, ''Pr ...

, a nu metal band from Atlanta, Georgia * Tetrarchy, a subdivision of the

Royal Phalanx The Royal Phalanx ( el, Βασιλική Φάλαγξ) was a military body composed of veteran officers of the Greek War of Independence, established on 18 September 1835. The Phalanx entailed military garrison duties, but mostly it was an honorifi ...

in 19th-century Greece * HMS ''Tetrarch'' is the name of the two vessels that have served in the

Royal Navy The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by English and Scottish kings from the early medieval period, the first major maritime engagements were fought in the Hundred Years' War against F ...

See also