| Author | Titles | 1.
| Oppy, Graham | 2 | 2.
| O'Pray, Michael | 1 | 3.
| Oprea, Ion | 1 | 4.
| Oprescu, George | 2 | 5.
| Opsahl, Bjorn | 1 | 6.
| Opsmtelten, Bram | 1 | 7.
| Opstad, Jan-Lauritz | 2 | 8.
| Opstelten, Bram | 19 | 9.
| Optica. Centre d'Art Contemporain (Montrea, Canadá) | 1 | 10.
| Óptica Conde de Redondo. Galeria de Arte ( Lisboa, Portugal ) | 2 |
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