| Author | Titles | 1.
| Oralli, Roberto, 1947- | 1 | 2.
| Oram, Alice Lawrence | 2 | 3.
| Orama | 1 | 4.
| Oran, Alice | 2 | 5.
| Oranen, Mikko | 1 | 6.
| Orange, Alain de | 1 | 7.
| Orange County Museum of Art (Newport Beach, Calif., Estados Unidos) | 1 | 8.
| Orangerie des Tuileries (Paris, França) | 0 | 9.
| Author is: Musée de l'Orangerie (Paris, França) | 31 | 10.
| Orangerie (Kassel, Alemanha) | 1 | 11.
| Orangerie Unteres Belvedere (Viena, Áustria) | 1 |
|
|