Just to the north and completely overshadowed by St Mary's Church, sits the small Royal Chapel, squeezed between two houses. The only Baroque church in old Gdańsk, it was built between 1678 and 1681 to fulfil the last will of the primate of Poland of the time, Andrzej Olszowski. It was designed by famous royal architect Tylman van Gameren. Its façade is its more attractive feature, and bears the coats of arms of Poland, Lithuania and King Jan III Sobieski (the founder of the chapel).
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.