St Elidyr's Church was the principal place of worship of the Cawdor family, former owners of the Stackpole Estate. The church has medieval origins, but most of the original structure, apart from the 12th or 13th century tower and part of the chancel, has been absorbed into later additions and renovations.
The church is built on a slope in a wooded valley, the slope partly excavated to accommodate the building. Cruciform in plan, the chancel is about 6.5 metres long by 4.5 metres wide. There are north and south transepts, a vestry and a chapel. There is an open porch to the south, within which there is an early medieval inscribed stone. There was a crypt beneath the chancel, now filled in. The roof is slate, and there is a wrought iron cross at its eastern end. The altar table is oak, as are the communion rails.
The tower is a prominent feature and an older part of the church. It is of a typical local design with a parapet, but unusually slender. The lowest storey has a vault opening into the north transept. Two upper floors and the roof are crudely constructed. Each storey has windows or louvred openings, the lowest being blocked. The top storey has louvred openings on all four sides and there is a spiral staircase.
A stone cross with a modern head stands in the churchyard.
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.