Lagny Abbey
Lagny-sur-Marne, France
Lagny Abbey (St Peter’s Abbey, Lagny) was a monastery in the present-day commune of Lagny-sur-Marne in the department of Seine-et-Marne in France, in the eastern suburbs of Paris. It was founded in 644, refounded in about 990 and after well over a millennium of existence (almost 1, 150 years) was seized by the state during the French Revolution.
Monastery data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).