Dun Beag is an iron-age broch situated at the north end of a small rocky knoll. The broch consists of a drystone tower with a diameter of around 18.6 metres with walls about 4 metres thick at the base. The broch currently stands to a maximum height of 2 metres.
The interior has a diameter of about 11 metres, and the entrance is on the east side. Internally three openings are visible in the broch wall. One leads to a small chamber; a second leads to a long narrow gallery within the wall; and a third leads to the stone stair of which some twenty steps survive.
The broch was visited by Thomas Pennant in 1772, and it was still a substantial structure, with a height of perhaps 4 metres. Around half of its wall height has been lost since the 18th century. The broch was excavated by the Countess Vincent Baillet de Latour between 1914 and 1920. Some 200 tons of earth and stones were removed from the broch and all the soil was sifted through the excavators' fingers. The standard of recording and publication was poor. Finds included many stone implements and utensils, a gold ring, bronze objects, a piece of folded sheet lead, iron and glass objects, a borer of bone, a pick made from an antler, much pottery and a stone cup. Several hundred glass beads were found although they are not thought to be prehistoric. Coins of Henry II, Edward I, James VI, George II and George III have been discovered, and it is possible that the broch was in use until comparatively recently.
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.