Oakham, Decorated Spire of, [60].
Ogee-shaped arch, [129].
Oppenheim, St. Catherine at, [107].
Orleans, Capital from house at, [197].
Orleans, Window at, [196].
Pavia, Certosa, near, [114], [188].
Palladio, Architect, [172], [184], [187].
Paris, Cathedral of Notre Dame, [74].
—— Hôtel des Invalides at, [205].
—— Louvre, Capital from, [202].