The Cathedral is dedicated to the Virgin Mary and to Saint Cecilia.
It is the seat of the archbishop of Cagliari.

It was built in the 13th century in Pisan-Romanesque style, obtaining cathedral status in 1258.
In the 17th and 18th centuries it was renovated along Baroque lines.
In the 1930s it finally received the current façade, in Neo-Romanesque style, inspired by Pisa Cathedral.