Velkua Church, also known as St. Henry’s Church, was built in 1793. The wooden church is the only one ever built to Velkua. After the Palva sea battle in 1808 Russian soldiers robbed all movable inside the church. Only the original altarpiece survived and is still in the church. New church bells were added in 1813. Today the church site is marked as national built heritage by National Board of Antiques.
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.