| ARTIST | BORN-DIED | PERIOD | SCHOOL |
|---|
| U | UBERTI, Pietro | (1671-1762) | Baroque | Italian painter (Venice) |
| | UBERTINI, Francesco (see BACCHIACCA) | (1494-1557) | High Renaissance | Italian painter (Florence) |
| | UBRIACHI, Baldassare degli (see EMBRIACHI, Baldassare degli) | (active 1390-1409) | Medieval | Italian sculptor |
| | UCCELLO, Paolo | (1397-1475) | Early Renaissance | Italian painter (Florence) |
| | UDEN, Lucas van | (1595-1672) | Baroque | Flemish painter (Antwerp) |
| | UGO DA CARPI | (c. 1480-c. 1523) | High Renaissance | Italian graphic artist |
| | UGOLINO DA SIENA (see UGOLINO DI NERIO) | (active 1317-1339/49) | Medieval | Italian painter (Siena) |
| | UGOLINO DI NERIO | (active 1317-1339/49) | Medieval | Italian painter (Siena) |
| | UGOLINO DI VIERI | (active 1328-c. 1380) | Medieval | Italian goldsmith (Siena) |
| | UGOLINO-LORENZETTI | (active 1340-60) | Medieval | Italian painter (Siena) |
| | ULFT, Jacob van der | (1627-1689) | Baroque | Dutch painter (Rome) |
| | UNKNOWN ICON PAINTERS, Creten | (2nd half of 15th century) | Medieval | Greek painter (Crete) |
| | UNKNOWN ICON PAINTERS, Russian | (13th-18th cents.) | Medieval | Russian painter |
| | UNKNOWN MASTERS, Austrian | (1st half of 15th cent.) | Medieval | Austrian painter |
| | UNKNOWN MASTERS, Bohemian | (14th-15th cents.) | Medieval | Bohemian painter (Prague) |
| | UNKNOWN MASTERS, Catalan | (11th-14th cents.) | Medieval | Catalan painter |
| | UNKNOWN MASTERS, Dutch | (15th-17th cents.) | Baroque | Dutch graphic artist |
| | UNKNOWN MASTERS, English | (11th-16th cents.) | Medieval | English sculptor |
| | UNKNOWN MASTERS, Flemish | (active 15th cent.) | Northern Renaissance | Flemish painter |
| | UNKNOWN MASTERS, Flemish | (active 16th cent.) | Mannerism | Flemish painter |
| | UNKNOWN MASTERS, Flemish | (15th-16th cents.) | Northern Renaissance | Flemish graphic artist |
| | UNKNOWN MASTERS, Flemish | (15th-16th cents.) | Northern Renaissance | Flemish sculptor |
| | UNKNOWN MASTERS, French | (14th-17th cents.) | Medieval | French painter |
| | UNKNOWN MASTERS, French | (11th-12th cents.) | Medieval | French sculptor |
| | UNKNOWN MASTERS, French | (13th-14th cents.) | Medieval | French sculptor |
| | UNKNOWN MASTERS, French | (15th-16th cents.) | Northern Renaissance | French sculptor |
| | UNKNOWN MASTERS, German | (active 14th cent.) | Medieval | German painter (Cologne) |
| | UNKNOWN MASTERS, German | (active 15th cent.) | Medieval | German painter (Cologne) |
| | UNKNOWN MASTERS, German | (12th-15th cents.) | Northern Renaissance | German painter |
| | UNKNOWN MASTERS, German | (15th-16th cents.) | Northern Renaissance | German painter |
| | UNKNOWN MASTERS, German | (2nd half of 15th cent.) | Northern Renaissance | German graphic artist |
| | UNKNOWN MASTERS, German | (2nd half of 11th cent.) | Medieval | German sculptor |
| | UNKNOWN MASTERS, German | (active 12th cent.) | Medieval | German sculptor |
| | UNKNOWN MASTERS, German | (13th-16th cents.) | Medieval | German sculptor |
| | UNKNOWN MASTERS, Hungarian | (15th-17th cents.) | Northern Renaissance | Hungarian painter |
| | UNKNOWN MASTERS, Hungarian | (13th-16th cents.) | Medieval | Hungarian sculptor |
| | UNKNOWN MASTERS, Italian | (12th-13th cents.) | Medieval | Italian painter |
| | UNKNOWN MASTERS, Italian | (active 14th cent.) | Medieval | Italian painter |
| | UNKNOWN MASTERS, Italian | (15th-17th cents.) | Early Renaissance | Italian painter |
| | UNKNOWN MASTERS, Italian | (11th-16th cents.) | Medieval | Italian sculptor |
| | UNKNOWN MASTERS, Netherlandish | (15th-17th cents.) | Northern Renaissance | Netherlandish sculptor |
| | UNKNOWN MASTERS, Netherlandish | (15th-17th cents.) | Northern Renaissance | Netherlandish graphic artist |
| | UNKNOWN MASTERS, Portuguese | (15th-16th cents.) | Early Renaissance | Portuguese painter |
| | UNKNOWN MASTERS, Spanish | (13th-14th cents.) | Medieval | Spanish painter |
| | UNKNOWN MASTERS, Spanish | (active 15th cent.) | Early Renaissance | Spanish painter |
| | UNKNOWN MASTERS, Spanish | (11th-16th cents.) | Medieval | Spanish sculptor |
| | UNTERBERGER, Christoph | (1732-1798) | Rococo | Austrian painter (Rome) |
| | UNTERBERGER, Michelangelo | (1695-1758) | Baroque | Austrian painter |
| | UTRECHT, Adriaen van | (1599-1652) | Baroque | Flemish painter |
| | UYTEWAEL, Joachim (see WTEWAEL, Joachim) | (1566-1638) | Baroque | Dutch painter (Utrecht) |
