Pezinok Castle was originally a Gothic castle built at the turn of 13th and 14th centuries by Counts from Svätý Jur and Pezinok. After their death the castle had different owners (baron Krušič, count Illesházy, Pálffy family). In 1875 a lightning caused extensive damage to its nothern part, which fell apart and a new building was built at this place. In 1931 the town purchased the castle and sold it to Slovak Vintner Association in 1936. Currently it is the property of the Vintner Company and inside the castle is surrounded by a park which was created by Count Francis Pálffy in 1884 in the style of an English garden. Within the park are rare trees and a fishing pond with water fowl.
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.