The Royal Abbey of St. Vincent was a former monastery of canons regular in Senlis, Oise, which was dissolved during the French Revolution. Late in their history, they became part of a new congregation of canons regular with the motherhouse at the Royal Abbey of St Genevieve in Paris, known as the Genofévains, widely respected for their institutions of learning.
The abbey was founded in 1065 by Queen Anne of Kiev, the widow of King Henry I of France, possibly built on the ruins of an ancient chapel dedicated to St. John the Baptist which had been destroyed in the course of invasion by the Normans in the late 900s. King Philip I of France later declared it to be a royal abbey, independent of all authorities, both ecclesiastical or civil, and made a number of grants of land to the community.
The abbey flourished between the 12th-14th centuries. During this period, the abbey went to great efforts to maintain its independence from the local authorities.
The decline started from the 16th century when there were internal disputes. Anyway the commendatory abbots continued to care for the abbey throughout the rest of its history. They made improvements in the walls and buildings until the mid-18th century. The coming of the French Revolution put an end to its life. In 1791, the canons were assembled and ordered to vacate the abbey, in compliance with the suppression of all religious houses under the new laws of the Republic.
The buildings were seized by the revolutionary government and used in various ways, from a military hospital to a prison for prisoners of war. In 1804, the complex was rented to a manufacturer. By 1835 they had fallen into the hands of a developer who had slated the walls and building for demolition. The following years, three canons of Beauvais were able to raise the funds to purchase the property. They then opened a school for boys.
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.