In the 1540s, the fortifications of Messina were being modernized due to fears of the expanding Ottoman Empire. Forte Gonzaga was built on the hill of Montepiselli, outside the city walls. It was able to defend the mountainous landward approach to the city, and it also overlooked the Strait of Messina. The fort was designed by Antonio Ferramolino, a military engineer from Bergamo. He was assisted by Francesco Maurolico, a native of Messina. It was named after the Viceroy of Sicily Don Ferrante Gonzaga, and was completed in 1545.
The Ottoman threat was reduced after the Catholic victory in the Battle of Lepanto in 1571, and the fort's importance began to decline. It saw use during the 1674–78 uprising against Spanish rule. Spain eventually lost Sicily in 1713, but invaded the island five years later during the War of the Quadruple Alliance. During the invasion, the fort did not offer much resistance and was captured by the Spanish general Luca Spinola.
During the Sicilian revolution of 1848, the fort was captured by rebels, who used it to bombard the Real Cittadella which was still in Bourbon hands.
Forte Gonzaga saw use in World War II when it was used by German and Italian forces prior to the Allied invasion, and it was subsequently used by American forward observers to direct artillery fire during the invasion of Italy. It remained a military establishment until 1973, when the Italian Army handed it to the municipality of Messina. There are plans to restore the fort and turn it into a museum and conference centre.
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.