The Church of the Santissima Annunziata dei Catalani is an example of Norman architecture on Sicily. It dates from the 12th century, when Sicily was under Norman rule. Built on top of the ruins of an older temple dedicated to Neptune, the church is an example of Sicilian Norman architecture with its mix of different cultural elements.
The church displays influences from Arab and Byzantine architecture and also contains Roman elements. Particularly the apse is unusually well-preserved. The name of the church derives from merchants from Catalonia who established a presence in Messina in the 16th century.
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.