The Cathedral of the Assumption of the Blessed Virgin Mary – Pula – Istria – Croatia, was built in the 6th century, when Pula became the seat of a bishopry, over the remains over the original site where the Christians used to gather and pray in Roman times.
It was enlarged in the 10th century. After its destruction by Genoese and Venetian raids and it was almost completely rebuilt in the 15th century. It got its present form when a late Renaissance facade was added in the early 16th century.
The Cathedral of the Assumption of the Blessed Virgin Mary – Pula – Istria – Croatia, still retains several Romanesque and Byzantine characters. Such as some parts of the walls (dating from the 4th century), a few of the original column capitals and the upper windows of the nave.
In the altar area and in the room to the south one can still see fragments of 5th- or 6th-century floor mosaics. These include memorial inscriptions from worshippers who paid for the mosaics.
The windows of the aisles underwent reconstruction in Gothic style after a fire in 1242.
The belfry in front the church was built between 1671 and 1707 with stones form the amphitheater. There also used to stand a baptistery from the 5th century in front of the church. It was later demolished in 1885.