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| Ullswater (80x60) - Michael Trevillion | Umschlungen (70x50) - Kirsten Riedt |
| Un engouement croissant (30x30) - Paul Raynal | Un engouement croissant (70x70) - Paul Raynal |
| Un modèle (70x70) - Paul Raynal | Un peintre à la Tour Eiffel (30x24) - Bettmann |
| Un peintre à la Tour Eiffel (30x24) - Bettman | Una Bella Serata (100x50) - Stefano Ferreri |
| Une seconde avant l'eveil (60x80) - Salvador Dali | Unfinished Symphony (40x50) - Tamasa Martin |
| Unforgettable I (50x40) - Hans Paus | Unforgettable I (80x60) - Hans Paus |
| Unforgettable II (50x40) - Hans Paus | Unforgettable II (80x60) - Hans Paus |
| Unforgettable prospect (30x24) - Peter Motz | Unforgettable prospect (80x60) - Peter Motz |
| Unpredictable (100x70) - Reint Withaar | Unterach sul'Attersee (68x68) - Gustav Klimt |
| Unterwegs (58x48) - Janosch | Untiteled (60x80) - Keith Haring |
| Untiteled, AIDS Update (24x30) - Keith Haring | Untiteled, Emporium Capwell (60x80) - Keith Haring |
| Untiteled, Wedding Invitation (24x30) - Keith Haring | Untitled (60x80) - Keith Haring |
| Untitled (90x120) - Mark Rothko | Untitled (50x100) - Mark Rothko |
| Untitled (50x100) - Mark Rothko | Untitled - No. 15, 1949 (99x158) - Mark Rothko |
| Untitled, 1950 (80x120) - Mark Rothko | Untitled, 1960 (60x80) - Mark Rothko |
| Untitled, 1962 (40x40) - Mark Rothko | Untitled, 1962 (115x120) - Mark Rothko |
| Untitled, 1982 (80x60) - Keith Haring | Up, up and away (110x62) - Sigi Loew |
| Upolo Cay (100x32) - John Xiong | Upwards (50x70) - Wassily Kandinsky |
| Urban Country I (91x61) - Judeen | Urban Country II (91x61) - Judeen |
| Urbino, Palazzo-Ducale (60x79) - Ralf Westphal | USA Map II (91x66) - Aaron Foster |
