Neristan (downtown) is the name of the old town of Kokkola. Neristan is one of the most extensive wooden towns in Finland. The town plan of 12 blocks is derived from the 1660's. Most of the buildings were built between 1810 and 1880, although the oldest buildings are up to the 1600s.
Until the beginning of 1900s city of Kokkola was divided to Oppistan (upper town) and Neristan (downtown). Oppistan, the current city center, was the business district of rich merchants and the old shipping families. Neristan was inhabited by various craftsmen and sailors. Today most fine stone houses of Oppistan are demolished, but Neristan has remained fairly cohesive with its narrow streets and small gardens.
National Board of Antiquities has defined the Neristan area as a national built heritage.
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.