Neath Abbey was a Cistercian monastery, located near the present-day town of Neath. It was once the largest abbey in Wales. Substantial ruins can still be seen, and are in the care of Cadw.
Neath Abbey was established in 1129 AD when Richard I de Grenville, one of the Twelve Knights of Glamorgan, gave (3,200 ha of his estate in Glamorgan, Wales, to Savigniac monks from western Normandy. The first monks arrived in 1130. Following the assumption of the Savigniac order into the Cistercian order in 1147, Neath Abbey also became a Cistercian house. The abbey was ravaged by the Welsh uprisings of the 13th century. During the Dissolution of the Monasteries by King Henry VIII of England the last abbot, Lleision ap Thomas, managed to buy time through payment of a large fine in 1536, but the abbey was dissolved in 1539.
At this time, the abbey was turned into a large estate, initially granted to Richard Williams, although by 1600 it was owned by Sir John Herbert, and had a substantial Tudor mansion occupying a part of the cloisters. The mansion itself was only habitable for 100 years or so, before being abandoned as the site became a scene of industry.
By 1730, some of the buildings were being used for copper smelting, and the rest were abandoned. In the late 18th century, an iron foundry was opened near the abbey ruins by a company owned by the Price, Fox and Tregelles families. The ruined walls of both the Abbey and later mansion were gradually engulfed in quantities of industrial waste. The ownership of the site passed to the Rice family, Barons Dynevor, and it was in the 1920s, under Walter FitzUryan Rice, 7th Baron Dynevor that a local group of amateur archaeologists began the process of uncovering the medieval ruins.
North of the abbey ruins are the remains of the gatehouse which would have controlled access into the abbey precinct. It now stands on New Road alongside the playground of Abbey Primary School. It was originally built around 1130, but the most prominent surviving features, two pointed windows that face onto the road, date from the 13th or 14th century.
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.