Church of San Andrés is an impressive church built in stone in the 16th century. In the same building, several architectural styles are to be seen, from the gothic to the neoclassical and the renaissance. The most Gothic parts are the nearest to the towers. It's the only remaining part of the Gothic building over which the current building was erected. Picturesque columns and archs. In the other part of the church we can see the sacristy, in neoclassical style. In the middle part we can see the stylistic evolution in the building. In the 'crucero' part we can see a Renaissance style. The church has also a baroque and renaissance-style altarpiece. The 18th-century organ, of classical style, is still in use and used for concerts.
References: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.