Aversa Cathedral has been the seat of the Bishop of Aversa from the bishopric's foundation in 1053. The Romanesque cathedral, founded by Normans and dedicated to Saint Paul, has a spectacular ambulatory and an octagonal dome. It has undergone numerous renovations, up to the current Baroque form. The bell tower was built in 1499.
Francesco Solimena's Madonna of the Gonfalone is kept here. The pre-Romanesque sculpture of Saint George and the Dragon is one of the few surviving free-standing sculptures of its date. An outstanding collection of Baroque liturgical silver is kept in the treasury.
The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.