The Old Church of Loppi, also known as Santa Pirjo (St. Birgit), was built in 1660s. The history of simple and bare wooden church is quite unknown because documents of building were destroyed by fire. According some investigations the church could be completed already in the tide of 15th and 16th centuries, but the age of wall logs is dated to the year 1666.
Only couple of tombs remain of the old cemetery near the church. Nowadays Loppi Old Church is popular wedding and concert church.
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.