The oldest part of the St. James parish church is the tower chapel (10th century) with two compact columns and cube-shaped capitals (Chapel of Grace today). The church was erected in the 12th century as the result of a vow made by Engelhard Brömser who had promised to build a church if he returned home safely from his captivity by the Moors. The Gothic hall church from the 14th/15th century is also a gift from the Brömser family. It was completely renovated in 1719. In 1766 a 'pigtail helmet' (onion tower) was added to the Romanesque church tower and a Baroque high altar was installed. An ambitious expansion of the parish church was carried out in 1913-1914. On 25 November 1944, the church was almost completely destroyed during a heavy bomb attack. Immediately after World War II, work began to rebuild the church as a hall church incorporating the preserved old parts. St. James' Church was consecrated in 1955.
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.