The ancient Vrykous city of the Dorians may have reached its peak during the 4th and the 3rd centuries BC, but this place seems to have been inhabited since the Minoan – Mycenaean era. The ancient city has been completely looted. Its carved tombs stand wide open with no grave goods left in them. The residents Christianized the place during the next centuries (according to reports of the Archaeological Service three basilicas were built during the 5th and 6th century) and used ancient materials to honor Ai-Giannis of Vroukounta at the edge of the cape inside a hidden cave.
Walking down the stone steps of the cave the visitor-pilgrim comes across the inner sanctuary of this rudimentary church.
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.