| Author | Titles | | 1.
| Oosterhoff, Wiebe | 1 | | 2.
| Oosterhuis, Kas, ca 1951- | 1 | | 3.
| Oosterman, Arjen | 2 | | 4.
| Oostrom, Frits Pieter van | 1 | | 5.
| Oostveen, Daan F, | 1 | | 6.
| Opacic, Aleksandar, 1973- | 2 | | 7.
| Opel, Adolf | 1 | | 8.
| Open Project (Firma de Arquitectura) | 1 | | 9.
| Openshaw, Hector F. | 1 | | 10.
| Opera Bevilacqua la Masa. Galleria (Veneza, Itália) | 3 |
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