In 1231 the city of Kowalewo was captured by the Teutonic Knights. They soon built a castle, and in 1275 they granted city rights to this developing settlement. After the complete destruction of the city and the castle by the Tatars in 1286, relocation took place, most probably under the conditions of the Chełmno Law. The castle was rebuilt in 1278. Invasions of the Prussians, Tatars, and Lithuanians hastened the decision to build the defensive walls around the Kowalewo in the 14th century. In 1454 the city was invaded by the armies of the Prussia States who formed a rebellion against the Teutonic Knights.
Finally, in 1466 Kowalewo constituted a section of Poland. Since the 15th century in Kowalewo the Magistate Courts and Sejmik of the Chełmno Land had gathered. The city played a role of the local trade and craft center. During 1629, 1655-1657 the city was occupied and plundered by the Swedes, in 1713 by the Russians. In 1772 only 34 houses of the townspeople existed. The city walls were ruined, as well as the castle and church.
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.