| Autor | Títulos | | 1.
| OMA - Office for Metropolitan Architecture (Firma de Arquitectura) | 25 | | 2.
| O'Mahony, Marie | 2 | | 3.
| O'Malleey, Austin | 1 | | 4.
| O'Malley, Owen Saint Clair | 1 | | 5.
| Oman, Carles | 1 | | 6.
| Oman, Carola Mary Anima | 1 | | 7.
| Oman, Charles, 1860-1946 | 0 | | 8.
| Ver: Oman, Charles William Chadwick, Sir, 1860-1946 | 6 | | 9.
| Oman, Charles Chichele | 4 | | 10.
| Oman, Charles William Chadwick | 3 | | 11.
| Oman, Charles William Chadwick, Sir, 1860-1946 | 6 |
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