Weston Triptych (John the Baptist) (triptych, left wing, outside)

The exterior wing of the Weston Triptych showing John the Baptist dates from about 1432, early in Rogier's independent career. Triptych exteriors were typically painted in grisaille—monochrome imitation of sculpture—visible when the altarpiece was closed during non-feast days. This panel at the Museum of the Order of St John reflects that liturgical function. Rogier van der Weyden, the most influential Flemish painter of the mid-fifteenth century, combined Jan van Eyck's technical achievements in oil painting with a new emotional intensity and compositional drama that his predecessor's work had not achieved. His altarpieces for the major churches and institutions of Brussels, Bruges, and their international clientele defined the vocabulary of Flemish devotional art for two generations. Painters from Germany, France, Spain, and Italy absorbed and adapted his compositional formulas and his approach to devotional emotion, making him the single most important transmitter of Flemish painting technique and aesthetic to the broader European tradition.

The grisaille technique mimics stone sculpture with subtle tonal gradations, demonstrating van der Weyden's ability to create convincing three-dimensional illusion through a restricted monochrome palette.