| Master of the Die | — | 1512–1570 | 11 |
| Master of the Death of Absalom | — | 1450 | 1 |
| Master of the Day of Judgement | — | — | 12 |
| Master of the Darmstadt Passion | Germany | 1450 | 7 |
| Master of the Cypresses | Spain | — | 8 |
| Master of the Cross 434 | — | 1230 | 1 |
| Master of the Cortege | France | — | 2 |
| Master of the Cologne legend of St. Ursula | Germany | 1475 | 6 |
| Master of the Collins Hours | — | — | 2 |
| Master of the Codex Rossiano | Italy | — | 1 |
| Master of the Codex of Saint George | — | 1400–1400 | 3 |
| Master of the Clarisse Panel | — | 1300 | 1 |
| Master of the Cini Madonna | — | — | 3 |
| Master of the Catholic Kings | — | 1470–1505 | 3 |
| Master of the Burg Weiler Altarpiece | Germany | — | 1 |
| Master of the Brussels Epiphany | — | — | 1 |
| Master of the Brussels Calling of Saint Matthew | Habsburg Netherlands | — | 2 |
| Master of the Brunswick Diptych | — | 1500–1500 | 1 |
| Master of the Bruges Passion Scenes | — | 1436–1504 | 1 |
| Master of the Bruges Legend of St. Ursula | Burgundian State | 1436–1504 | 7 |
| Master of the Brandon Portrait | Southern Netherlands | 1500 | 1 |
| Master of the Bracciolini Chapel | — | 1370–1420 | 1 |
| Master of the Borghese Tondo | — | 1450–1520 | 2 |
| Master of the Blue Crucifixes | — | 1240–1260 | 1 |
| Master of the Bigallo Crucifixion | — | 1150 | 3 |
| Master of the Biberach Holy Kinship | Germany | 1500–1600 | 1 |
| Master of the Berswordt Altar | — | — | 2 |
| Master of the Benediktbeuren Crucifixion | — | 1440–1460 | 1 |
| Master of the Beighem Altarpiece | Southern Netherlands | 1550 | 2 |
| Master of the Béguins | France | — | 3 |
| Master of the Baroncelli Portraits | County of Flanders | 1500–1600 | 3 |
| Master of the Bargello Tondo | — | 1400–1450 | 2 |
| Master of the Banderoles | Kingdom of the Netherlands | 1450 | 3 |
| Master of the Bambino Vispo | — | 1400–1500 | 1 |
| Master of the Augsburg Ecce Homo | — | 1520–1560 | 1 |
| Master of the Ashmolean Predella | — | 1301–1401 | 1 |
| Master of the Argonauts | — | — | 1 |
| Master of the Arcetri Altarpiece | — | — | 1 |
| Master of the Apollo and Daphne Legend | — | 1470–1520 | 2 |
| Master of the Antwerp Triptych of the Virgin | Habsburg Netherlands | — | 1 |
| Master of the Antwerp Adoration | Southern Netherlands | 1500–1600 | 4 |
| Master of the Annunciation to the Shepherds | — | 1505–1700 | 1 |
| Master of the André Virgin | — | 1500–1600 | 1 |
| Master of the Adoration of the Shepherds | — | — | 1 |
| Master of the Acts of Mercy | Austria | 1440 | 1 |
| Master of the Aachen Doors | — | — | 1 |
| Master of the Aachen Altar | Germany | 1500–1600 | 5 |
| Master of the 1540s | Netherlands | 1545–1600 | 2 |
| Master of Tavarnelle | — | 1500–1600 | 1 |
| Master of Taüll | Crown of Aragon | 1100–1199 | 12 |
| Master of Staffolo | — | — | 1 |
| Master of Sorpe | — | — | 1 |
| Master of Soriguerola | — | 1250–1400 | 4 |
| Master of Sopetrán | — | 1450 | 4 |
| Master of Sigena | Spain | — | 2 |
| Master of Schloss Lichtenstein | Austria | 1400–1460 | 2 |
| Master of Santa Coloma de Queralt | — | — | 1 |
| Master of Santa Coloma d'Andorra | — | 1200–1200 | 1 |
| Master of Sant Esteve d'Andorra | — | — | 4 |
| Master of San Torpè | — | 1250–1325 | 3 |