Quote Originally Posted by Wigferth Ironwall
For example, Livy says the Republic was founded in 510 BC, archaeology suggests he's off by about three years or so
506 is the generally accepted date, though some claim it wasn't until around 475. The date 510 probably ended up being official history because it's the same year in wich the tyrant Hippias was expulsed from Athens, in wich the Romans saw a parallel situation to wich they liked to compare themselves.