| Author | Titles | | 1.
| The Old Chapel Graphic Design (Firma de Design) | 1 | | 2.
| Old Pinakothek in Munich (Alemanha) | 0 | | 3.
| Author is: Alte Pinakothek (Munique, Alemanha) | 8 | | 4.
| Old Truman Brewery (Londres, Grã-Bretanha) | 1 | | 5.
| Old Yacht Club. Sirius Project (Cobh, Irlanda) | 1 | | 6.
| Oldani, Alessandro | 2 | | 7.
| Olden, Wolfgang Schulze, | 2 | | 8.
| Oldenberg, Hermann | 2 | | 9.
| Oldenburg, Claes, 1929-2022 | 11 | | 10.
| Oldenburg, Maartje | 1 | | 11.
| Oldenburg, Peter | 1 |
|
|
