Atri is a small town in the province of Teramo, in the Abruzzo region of Italy. It is a town of great historical and artistic interest, with a well-preserved medieval centre. The town is dominated by the Castello Caldora, a fortress on a hill above the town, built in the 14th century. The town's main square, Piazza Garibaldi, is surrounded by ancient palaces and churches. Notable churches in the town include the 12th-century cathedral of Santa Maria Assunta, the 15th-century Chiesa di Santa Maria della Neve, and the 18th-century Chiesa di San Domenico. The Palazzo Comunale, the town hall, is a 14th-century building with a 16th-century facade. The Palazzo Ducale, the residence of the dukes of Atri, is a 15th-century palace.