Aosta stands at the junction of two of the important trade routes that connect France and Italy, the valleys of the Rhône and the Isère. Its significance as a trading post was recognized by the Romans, who built a garrison here in the 1st century BC, and the present-day layout of the streets is the clearest example you'll find of Roman urban planning in Italy. Well-preserved Roman walls form a perfect rectangle around
the center, and the regular pattern of streets reflects its role as a military stronghold. Though its gray-stone buildings and slate roofing give a rather cold feeling to the town, Aosta has recently began to appear on several lists as one of the most livable towns in Italy.