The current Węgorzewo town was first mentioned in a 1335 chronicle as Angirburg, or 'eel castle', a settlement of the Teutonic Knights with a block house, a palisade, and a watchtower. The Grand Duke of Lithuania, Kęstutis, destroyed the wooden castle in 1365. Teutonic Knights built new brick castle in 1398. It was situated 2 km away from burnt castle on river island. Near by the castle grew settlement New Village which got allocation privilege in 1514.
From 1525 the castle was a residence of princely district. In 1734 and 1736 King of Poland Stanislaw Leszczynski visited the castle. After World War II the town was burnt by Russian soldiers and the castle was destroyed. It was rebuilt in 1980's.
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.