Revelin Fort was built outside the city walls and is partially included into the defence complex of the Ploče Gate. The lower part of the fort was built in 1463, in the shape the City model held by St. Blaise on the triptych painted by Nikola Božidarević around 1500. The fort protected both the eastern part of the City from mainland and the entrance to the City Harbour.
In 1538 the fort was strengthened and enlarged in the form of an irregular square according to the instructions of Italian engineer Antonio Ferramolino of Bergamo. Revelin has three entrances, and was encompassed by the moat and sea on three sides. The well-known Renaissance craftsman Ivan Rabljanin kept the foundries for casting cannons and bells in the large Fort interior.
Today, the spacious fort terraces serve as venues for various performances of the Dubrovnik Summer Festival.
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.