Aros castle was probably built by one of the MacDougall Lords of Lorn in the 13th century and was once the major stronghold of the Lords of the Isles. It first comes on record in the later 14th century when it was in the possession of the Lords of the Isles. It appears to have been garrisoned by Argyll’s troops in 1690, though it was described two years previously as ‘ruinous, old, useless and never of any Strength’. Throughout the 18th century the lands of Aros were farmed by a succession of Campbell tacksmen, but there is no record of the castle having been inhabited at this period.
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.