(b Antwerp, 31 Mar. 1739; d Brussels, 30 Mar. 1822).
Flemish painter and writer on art, active mainly in Antwerp (until 1781) and then Brussels. In 1764–8 he lived in Rome, where he was strongly influenced by Winckelmann's ideas, and on his return to Flanders he became his country's leading exponent and promoter of Neoclassicism. His work included religious, mythological, and allegorical scenes in a graceful but vapid style, as well as occasional portraits. He also wrote two treatises—on ancient costume (1776) and on beauty and taste in painting (1811).