Teutonic Castle Ruins from the 14th century with the high tower (56 m high) has been survived to the nowadays in Brodnica. The castle was the headquarters of the commander of Brodnica and was one of the most powerful Teutonic castles. During the 13-year war was occupied by the Polish army in 1454 and 1463. From 1479 to the partition of Poland in 1772 the castle was the seat of Polish mayors (1485-1604 Działyński, and the most famous: princess Anna Vasa 1604-1625). The castle was destroyed during the Swedish wars in the 17th century and in the years 1785-1842 was partially demolished by order of King Frederick II of Prussia. The castle is adjacent to the northwest part of the city walls, used to protect one of the most important passages on the River Drwęca. Built on a square plan with an inner courtyard, surrounded by a moat and linked to the flowing beside Drwęca.Currently in the basement of the castle the museum exhibition is located.
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.