The Teutonic castle risen above the river in Pisz was named in turn Johannisburg. The first privilege regarding a settlement around the castle was granted in the year 1367. Pisz gained its civic rights in 1645 and officially received the name of the castle. The local people of Mazury called the castle 'Jańsbork' (Johannisburg), and this name remained until 1946. Today only fragments remain of this castle.
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.