「エトルリア同盟」が結成されたのいつ
According to legend, there was a period between 600 BC and 500 BC in which an alliance was formed among twelve Etruscan settlements, known today as the "Etruscan League", "Etruscan Federation", or "Dodecapolis" (in Greek Δωδεκάπολις). The Etruscan League of twelve cities was founded by two Lydian noblemen: Tarchon and his brother Tyrrhenus. Tarchon lent his name to the city of Tarchna, or Tarquinnii, as it was known by the Romans. Tyrrhenus gave his name to the Tyrrhenians, the alternative name for the Etruscans. Although there is no consensus on which cities were in the league, the following list may be close to the mark: Arretium, Caisra, Clevsin, Curtun, Perusna, Pupluna, Veii, Tarchna, Vetluna, Volterra, Velzna, and Velch. Some modern authors include Rusellae. The league was mostly an economic and religious league, or a loose confederation, similar to the Greek states. During the later imperial times, when Etruria was just one of many regions controlled by Rome, the number of cities in the league increased by three. This is noted on many later grave stones from the 2nd century BC onwards. According to Livy, the twelve city-states met once a year at the Fanum Voltumnae at Volsinii, where a leader was chosen to represent the league.
between 600 BC and 500 BC