Castello Ursino was built between 1239 and 1250, as one of the royal castles of Emperor Frederick II, King of Sicily. In 1295, during the Sicilian Vespers, the Parliament which declared deposed James II of Aragon as King of Sicily, replacing him with Frederick III, was held here. The following year it was captured by Robert of Anjou but was later again in Aragonese hands.
After the move of the capital away from Catania and the appearance of powder weapons, the castle lost its military role and was used as a prison. It is one of the few buildings in Catania to have survived the earthquake of 1693.
The castle was acquired by the city of Catania in 1932, and it was restored. The Museo civico opened in the restored castle on 20 October 1934. Today, the museum houses artifacts and artwork from the castle as well as the greater geographical area. These items date from the Classical era onward, representing the diverse influences throughout Sicilian history. Frequently, the castle hosts also temporary exhibitions or artistic events (theatrical representations and concerts).
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.