During the rule of the Venetians the Church of St. Maria was built in the Old Town in 1510. It was turned into a Mosque of the Sultan Selim II as soon as the Turks conquered Ulcinj in 1571. It used to be the so-called Xhamia Mbretrore – Imperial Mosque, as it did not have any Wakf from which it could have been financed at the beginning, so that its employees were paid from the state budget.
Hajji Halil Skura added a minaret in 1693 made of nicely cut stone, in the lower part, on a rectangular base, which was made narrower on top. The religious purpose of this mosque ended in 1880, when the Montenegrins liberated Ulcinj. This religious building also had a maktab. All the Ulcinj reises (captains) would gather there when an important decision had to be made.
This building is the most beautiful monument incorporating a combination of the West and the East in the architecture of Ulcinj. It hosts the town museum.
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.