The Holy Cross Church was built between 1734 and 1739 (the towers were built in between 1854 and 1856) in the location of the destroyed in 1545 monastery of the Dominicans - for the need of Jesuits which arrived to the town in 1677 (architect J. Frisch). The church has a single-aisle, with a number of side chapels and the tribunes. The ceiling stands out due to J.Kubena frescoes (1739-1745) presenting the glory of the Holy Cross, the missions of the Jesuit Order and figures of saints.
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.