Prytaneum and Prytanis (Gr. root προ, first or chief). In general in ancient Greece, each state, city or village possessed its own central hearth and sacred fire, representing the unity and vitality of the community. The fire was kept alight continuously, tended by the king or members of his family. The building in which this fire was kept was the Prytaneum, and the chieftain (the king or prytanis) probably made it his residence.
The word Prytanis (pl. Prytaneis) is generally applied specially to those who, after the abolition of absolute monarchy, held the chief office in the state. Rulers of this name are found at Rhodes as late as the 1st century B.C.
The Prytaneum was regarded as the religious and political center of the community and was thus the nucleus of all government, and the official "home" of the whole people. When members of the state went forth to found a new colony they took with them a brand from the Prytaneum altar to kindle the new fire in the colony; the fatherless daughters of Aristides, who were regarded as children of the state at Athens, were married from the Prytaneum as from their home; Thucydides informs us that in the Synoecism of Theseus the Prytanea of all the separate communities were joined in the central Prytaneum of Athens as a symbol of the union; foreign ambassadors and citizens who had deserved especially well of the state were entertained in the Prytaneum as public guests. This is the function that Socrates referred to in Plato's Apology when he said that instead of death he should be sentenced to be cared for in the Prytaneum. In Achaea, this central hall was called the Lefton (town-hall), and a similar building is known to have existed at Elis.
This site of the Prytaneum at Athens cannot be definitely fixed; it is generally supposed that in the course of time several buildings bore the name. The Prytaneum, mentioned by Pausanias, and probably the original center of the ancient city, was situated somewhere east of the northern cliff of the Acropolis. Hence the frequent confusion with the Tholos which was near the council chamber and was the residence of the Prytaneis of the council. Ernst Curtius places the original Prytaneum south of the Acropolis in the Old Agora, speaks of a second identical with the Tholos in the Cerameicus, and regards that of Pausanias as a building of Roman times. Charles Wachsmuth holds the former view and regards the Tholos as merely a dining-room for the Prytaneis in the old democratic period. Many authorities hold that the original Prytaneum of the Cecropian city must have been on the Acropolis. From Aristotle's Constitution of Athens we know that the Prytaneum was the official residence of the Archons, but, when the new Agora was constructed by Peisistratus, they took their meals in the Thesmotheteum for the sake of convenience.