Grunewald, Matthias German Northern Renaissance Painter, ca.1470-1528
.the traditional name of a painter whose real name is believed to have been Nithardt or Neithardt. He was active at Isenheim nr. Colmar c.1514 and in Frankfurt c.1526. Gr??newald's principal work, an elaborate altarpiece of many panels painted for the monastery at Isenheim (Isenheimer Altar), is now in the Colmar museum.