| Author | Titles | 1.
| Olazábal, Ana | 1 | 2.
| Olazabal, Pedro de | 1 | 3.
| Olbert, Ernst A., pseud. | 1 | 4.
| Olbrich, Harold | 3 | 5.
| Olcay, Nekriman | 2 | 6.
| Ölçer, Nazan | 2 | 7.
| Olcina i Aya, Emili | 10 | 8.
| The Old Chapel Graphic Design (Firma de Design) | 1 | 9.
| Old Pinakothek in Munich (Alemanha) | 0 | 10.
| Author is: Alte Pinakothek (Munique, Alemanha) | 8 | 11.
| Old Truman Brewery (Londres, Grã-Bretanha) | 1 |
|
|