The Tempietto di San Fedelino is a 10th to 11th-century small, Roman Catholic sanctuary or church, located in a remote rural site at the south shore of the River Mera. The small church is made of local stone and has a rounded apse. It still retains some 11th-century frescoes. The frescoes resemble those from the apse of the church of San Vincenzo in Galliano (circa 1004–1007).
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.