Castle Dybów or Dybowski Castle was built by Wladyslaw Jagiello in the years 1424-1428. With time, the castle was a settlement that was called Nieszawa. In 1431 Toruń destroyed the castle, but soon restored and the Teutonic Knights Castle in it judged his crew. After the Peace of Brest Kujawski castle with the left bank of the Vistula, he returned to Polish.
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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.