The Tower of Motta Sant'Anastasia was built between 1070 and 1074 by the will of the Count Roger of Hauteville. The massive tower with a rectangular plan, with a base of about 21.5 by 9 by 17 metres, is about 21 metres high and is a typical defensive structure of the early Middle Ages. The roof terrace retains almost intact battlements.
The structure consists of three elevations. Only the first of these is still the original arched windows ogive (external) and at all sixth (inside). The other two square windows, on other levels, such as the current front door, go back to the 15th century.
The ground floor was designed for military housing. In it there are a number of holes for defence.
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.