| Author | Titles | | 1.
| Unknown Design (Porto, Portugal) | 1 | | 2.
| Unlack, G | 1 | | 3.
| Uno Hoffmann, 1955- | 0 | | 4.
| Author is: Hoffmann, Uno, 1955- | 1 | | 5.
| Unruh, Walther | 1 | | 6.
| Unsal, Behçet | 1 | | 7.
| Ünsal, Deniz | 2 | | 8.
| Unseld, Siegfried | 1 | | 9.
| ünstlerbund Hagen (Grupo de artistas) | 0 | | 10.
| Related author: Kokoschka, Oskar, 1886-1980 | 13 | | 11.
| UNStudio (Firma de Arquitectura) | 2 | | 12.
| Unterdörfer, Michaela | 13 |
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