The King Friedrich Wilhelm I Fort (Fort Nr. 3), originally known as Quednau, was the largest fort of Königsberg fortification system. The fort was situated at the top of a height and surrounded by dry ditch. There were embrasures for defensive fire. In time of Kongsberg Storm the Fort was of severe resistance. Garrison remains was captured on the 9th of April 1945. After the WWII there was the army division in the Fort. Archeologists have found more than 30 000 objects from the ex- museum “Prussia”, when the division left.
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.