The Koski Mehmed Pasha Mosque in Mostar represents another extraordinary piece of Ottoman architecture in Bosnia and Herzegovina. It was built in 1618/1619 and represents the large construction of the classical Ottoman architecture in Bosnia and Herzegovina.
During the war in Bosnia (1992-95), it was badly damaged by the Croatian military forces, and its restoration took place during 1996-2001. The Mosque used to have an extraordinary collection of the manuscripts of the Qur'an, from which some were preserved but today they belong to other collections. The Mosque also possesses the carpet which was the gift from Austrian monarch Franjo Josip. The Koski Mehmed Pasha Mosque represents also one of the most popular touristic destinations in Mostar.
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.