Montier-en-Der Abbey
La Porte-du-Der, France · built 601
The Abbey of Montier-en-Der in Haute-Marne, France, was formerly a Benedictine, later Cluniac, abbey, dissolved during the French Revolution, the grounds and premises of which, since 1806, have been used as the French National Stud Farm.
Monastery data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).