Proper noun
A province of Sardinia, Italy.
The capital city of the province of Oristano, Sardinia, Italy.
Source: en.wiktionary.orgRoads The following national roads begin in Cagliari: Carlo Felice to Sassari - Porto Torres (motorway-like until Oristano) and to Olbia (SS131 Central Nuorese Branch). Source: Internet
In 1637 a French fleet led by Henri, Count of Harcourt sacked Oristano for about a week. Source: Internet