The Four Philosophers (
c. 1615. Oil on panel; 167 x 143 cm,
Pitti Palace,
Florence). In his friendship portrait of himself, his brother Philip Rubens,
Justus Lipsius and
Jan van den Wouwer (left to right), the painter Rubens's
self-portrait on the left is an example of a figural
repoussoir that is further accentuated by the flowing red curtain.