Roman colony from 177 b.C. and municipality from 89 b.C. of the Gallia Cisalpina, so augustean colony in the Regio VII, Lucca was famous centre of the Council for the renew of the first triumvirate between Cesare, Crasso and Pompeo. 
Its importance as road joint (Cassia street and Clodia street) was biggest and it is remainded in that way from the antiquity at the middle age. 
The town preservesthe urbanistic roman regular plant with blocks sqare built on the basis of the tree actus (long 105 meters): the Foro is occupied from church and from San Michele in Foro square, while, inside the walls at north, stay the theater ( the rests of the wedge are visible in the church of Sant'Agostino and in the surrounding streets). 
Out of walls, there is the amphiteatrum: the Mercato square occupies the zone where there was he amphiteatrum and the medieval house arereplaced at the cavea.