Marstal Church was built in 1738 and extended in 1772. Seven votive ships indicate the growth of shipping in the town from the 18th to the 20th century. The font dates from the Middle Ages. Carl Rasmussen, a maritime artist who usually specialized in the motifs of Greenland, painted the 1881 altarpiece, depicting Christ stilling a storm. In the old churchyard are memorials and tombstones honoring the sailors of Marstal who died at sea during two world wars.
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.