Gortyn or Gortys was a city that flourished particularly during the Roman era. It was the capital of the Roman province of Crete and Cyrenaica. It had its origins in the Minoan era (around 3200 BC).
The most distinctive monuments are the Praetorium, the residence of the Roman governor of the province, and the Nymphaion (both dating from 2nd century AD), where the Nymphs were worshipped. There is also a temple of Pythian Apollo the sanctuary of the Egyptian divinities and the Odeon, where the famous inscription with the laws of Gortys was found. Plato spoke of these laws, which were written in a Doric dialect and date from the 6th century B.C., with admiration.
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.