The Romanesque church is more or less the only part of the old Benedictine abbey that still remains. Note the doorway archivolts, decorated with geometric patterns in the style of Norman Romanesque buildings. The finely-worked, historiated capitals were designed by artists from the Île-de-France or the Chartres region. The nave has eight bays, flanked with aisles and was vaulted in the Gothic period; it has been restored to its primitive purity. There is a false triforium instead of galleries. Each side of the transept ends in an open gallery, resting on a monocylindrical column. A monumental 18C confessional occupies the southern transept. Part of the church has semicircular vaults. The apse vault is reinforced with heavy ribs in a cul-de-four. Behind the temporary altar is the black marble tombstone of Antoine le Roulx, the 19th abbot, who died in 1535. The old abbey of St George also has gardens, a chapter house, a convent building and the Chapel of the Chambellans. From the Pavillon des Vents, above a black flint and white stone staircase, a panoramic view stretches over the Seine valley and the abbey.