The Cathedral of St. James in Šibenik is a triple-nave basilica with three apses and a dome. It is the most important architectural monument of the Renaissance in the entire country. Since 2000, the cathedral has been on the UNESCO World Heritage List.
The building of the church was initiated in 1402, though plans on its construction had already begun in 1298, when Šibenik became a municipality. The actual work to transform the older Romanesque cathedral began in 1431. Built entirely of stone (limestone from a nearby stone quarry and marble from the island of Brač), it was completed in three phases, from 1433 to 1441, when the Grand City Council entrusted the work to local and Italian masters Francesco di Giacomo, Lorenzo Pincino, Pier Paolo Bussato, Bonino da Milano, and Giorgio da Sebenico (Juraj Dalmatinac) and to Croatian ones Andrija Budčić and Grubiš Šlafčić.
Its beauty is especially emphasized by the imposing Renaissance dome, the work of Niccolò di Giovanni Fiorentino, which was damaged in the Croatian War of Independence, and nowadays is a special symbol of Šibenik.
The Cathedral is also known for its iconographic innovations, among which a special place is occupied by sculptures of 71 heads on the outside part of the shrine, the work of Georgius Mathei Dalmaticus, for which scientists are still not quite sure who they represent.
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.