The Callanish IV stone circle is one of many megalithic structures around the better-known (and larger) Callanish Stones (I) on the west coast of the isle of Lewis. The stone circle forms a pronounced oval measuring 13.3 by 9.5 metres. Only five stones currently stand, but there could have been as many as thirteen. The stones range in size from 2 to 2.7 metres. In the centre is a dilapidated cairn. A small slab, 60 centimetres high, is set on edge within the cairn.
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.