Three large monoliths called Harold's Stones are located in a field on the eastern side of the B4293 to the south of Trellech. The stones are on slightly elevated ground close to running water and springs, which might be relevant to the choice of site. They are believed to date back to the Bronze Age. Such remains are rare in this part of Wales. They derive their name from a legend that they mark the spot at which three chieftains fell in battle with Harold Godwinson, who defeated the Welsh in Gwent in 1063. In another legend the stones were flung from Skirrid by the mythical Jack o' Kent in a competition with the Devil.
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.