| Author | Titles | | 1.
| Ottoson, Olga O. | 1 | | 2.
| Ou Ning, 1969- | 2 | | 3.
| Ouane, Adama | 1 | | 4.
| Ouarziz, Said, 1965- | 1 | | 5.
| Oubrerie, Clément, 1966- | 1 | | 6.
| Oubrerie, José | 1 | | 7.
| Oud Hospitaal (Aalst, Bélgica) | 1 | | 8.
| Oud, Jacobus Johannes Pieter, 1890-1963 | 1 | | 9.
| Oudart, 1881-1956 | 0 | | 10.
| Author is: Oudart, Félix, 1881-1956 | 1 | | 11.
| Oudart, Félix, 1881-1956 | 1 |
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