Arezzo (classic Arretium), an ancient town of Tuscany, Italy, on the confluence of the Chiano and the Arno, 38 miles south-east of Florence. It was one of the wealthiest and most populous of the twelve cities of Etruria, and became a Roman colony in 30 B.C. The ruins of an amphitheatre still remain. After a long struggle it submitted to the Florentines in 1531. Many eminent men were born here; amongst them Michael Angelo, Petrarch, Guido and Vasari. It was formerly celebrated for the manufacture of Etruscan vases.