The origins of this Benedictine abbey in Alet remain unknown: its foundation is attributed to Béra, the count of Razès, and his wife, Romille, in 813 A.D. but the documentary source of this information is not sure.
The history of the abbey has been one of a succession of quarrels and conflict due to its strategic location: for example, in the 11th century the abbey was ravaged by the Count of Carcassonne, then, in 1119, Alet abbey's rights over the abbey of Saint-Polycarpe were recognised to the detriment of the Lagrasse abbey.
The 12th century marked the peak of the abbey's history. It was very influential and attracted many pilgrims who came to see the abbey's relics of the Holy Cross.
The abbey was greatly weakened by the Crusade against the Cathars because of the ensuing conflicts with the Archbishop of Narbonne and the confiscation of property.
The Diocese of Alet was one of several bishoprics created in 1317 in the wake of the suppression of the Cathars. In Alet the bishops were also the abbots of the already existing monastery there and the cathedral of Our Lady was built next to the abbey.
In 1577 the cathedral was largely destroyed by the Huguenots during the Wars of Religion and was not subsequently rebuilt. The immense Gothic quire was demolished by order of the last bishop, Charles de la Cropte de Chancerac in 1776. The diocese of Alet was not restored after the French Revolution and by the Concordat of 1801 its parishes were added to the Diocese of Carcassonne.
The cathedral ruins remain a spectacular sight. As the main cathedral was for so long in ruins, part of the monastic buildings were used as an emergency substitute. These premises were known as St. Benedict's Cathedral.
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.