The Bois de Boulogne is a remnant of the ancient oak forest of Rouvray, which included the present-day forests of Montmorency, Saint-Germain-en-Laye, Chaville, and Meudon. Dagobert I, hunted bears, deer, and other game in the forest. His grandson, Childeric II, gave the forest to the monks of the Abbey of Saint-Denis, who founded several monastic communities there. Philip Augustus (1180–1223) bought back the main part of the forest from the monks to create a royal hunting reserve. In 1256, Isabelle de France, sister of Saint-Louis, founded the Abbey of Longchamp at the site of the present hippodrome.