
Oristano is a town and commune in Sardinia, Italy, the capital of the province of Oristano. It has some 30,000 inhabitants.

The economy is largely focused on fishing.
It is the seat of the Roman Catholic Archdiocese of Oristano.
History
Oristano was the Byzantine Aristianis, which was founded next to the ancient Phoenician city of Othoca (current Santa Giusta). It became important in 1070, when archbishop Torcotorio moved here the bishopric seat from Tharros, probably due the Saracen attacks. The city was also named as capital of the giudicato ("judiciary", equivalent to a Duchy or Kingdom) of Arborea, and a program of fortification was begun, which was however completed only under judge Mariano II.
In the Middle Ages Oristano was frequently warring against the other Sardinian kingdoms, which culminated in the attempt to conquer the whole island by Mariano IV (reigned 1347-75) and his daughter Eleanor (1375-1404). The giudicato of Arborea was the last Sardinian kingdom to be conquered by the Catalan troops of the Kingdom of Aragon, with the 1478 defeat at Macomer. After that day Oristano followed the history of Sardinia under the Aragonese-Spanish domination (until 1708) and Piedmontese (from 1720), and was then part of the Italy.
Main sights
- The Tower of St. Christophoros, erected in 1291, is the most visible part of the walls of the Giudicato age (it was one of the main gates).
- The Cathedral of St. Mary (1130), rebuilt during the reign of Mariano