A corpus of work is attached to the unidentified "Master of Flémalle," so named in the 19th century after three religious panels said to have come from a monastery in Flémalle. They are each assumed to be wings of triptychs or polyptychs, and are the Virgin and Child with a Firescreen now in London, a panel fragment with the Thief on the Cross in Frankfurt, and the Brussels version of the Mérode Altarpiece.
Robert Campin (* c. 1375 in Tournai; † 26 April 1444 in Tournai), now usually identified with the Master of Flémalle (earlier the Master of the Merode Triptych, before the discovery of three other similar panels), was the first great master of Flemish and Early Netherlandish painting. Campin's identity and the attribution of the paintings in both the "Campin" and "Master of Flémalle" groupings have been a matter of controversy for decades. Campin was highly successful during his lifetime, and thus his activities are relatively well documented, but he did not sign or date his works, and none can be confidently connected with him.
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Campin was active by 1406 as a master painter in Tournai, in today's Belgium, and became that city's leading painter for 30 years. He had attained citizenship by 1410, and may have studied under Jan van Eyck. His fame had spread enough by 1419 that he led a large and profitable workshop. He became involved in the revolt of the Brotherhoods in the early 1420s; this, along with an extra-marital affair with a woman named Leurence Pol, led to his imprisonment. Yet he maintained his standing and workshop until his death in 1444.