Flanders, Flemish
triptych
polytych
iconography, iconology

Robert Campin (Master of Flemalle) (c. 1375-1444), Merode Altarpiece, ("The Annunciation"), c. 1425-30, tempera
    and oil on  wood

Jan Van Eyck (c. 1390-1441)
    Philip the Good
    Man in a Red Turban, tempera and oil on wood, 1433
     Arnolfini Wedding (or Arnolfini Portrait), oil on wood, 1434
    The Madonna with Canon Van Der Paele, 1436, oil on Wood
    The Ghent Altarpiece, oil, completed 1432 (Jodocus Vijd, Isabel Borluut)

Rogier Van Der Weyden (1399-1463)
    Descent from the Cross, oil on wood
    St. Luke Painting the Virgin, oil and tempera on panel, c. 1435-40

Hugo Van Der Goes (1435/40-82), The Portinari Altarpiece, oil on wood, 1476