AREZZO, a city of Italy, in Tuscany, seated in the territory of Florence, on the declivity of a hill that overlooks the neighbouring plain, between the Città di Castello and Florence. It is an ancient city, and a bishop's see; and was famous for a kind of earthen ware much esteemed by the Romans. It was greatly fallen to decay when Colino de' Medici took it under his protection; since which it has been recovering gradually. It is famed for being the birth place of Mecenas. E. Long. 12. 2. N. Lat. 43. 27.