Cortona, a city of Italy, in the province and 14 m. S. E. of the city of Arezzo, in the Val di Chiana, on the railway from Arezzo to Perugia; pop. about 5,000. It contains a cathedral, theatre, and the palazzo Pretorio, the seat of the celebrated Etruscan academy, founded in 1726, comprising a library and a museum of Etruscan antiquities. It is one of the most ancient cities of Italy, and was once a member of the Etruscan confederacy, situated near the lake Thrasymenus. It is said to have been originally built by the Umbrians, and to have been in the possession of the Pe-lasgians for a considerable period before it fell into the hands of the Etruscans. It was afterward captured and colonized by the Romans, but under their dominion it sunk into insignificance and obscurity. Among the many interesting ancient relics of Cortona are the remains of the Cyclopean walls which surrounded the original city, and upon which those around the present city are built, a temple of Bacchus, and a sepulchral chamber of sandstone of Etruscan architecture.