Matthias Grünewald, c.1475 – August 31st 1528, is a major figure among German Renaissance painters such as Albrecht Dürer, Lucas Cranach, and Albrecht Altdorfer. Matthias (also first name Mathis, surname Gothart or Neithardt) focused on paintings of a religious nature.
In total there are only ten Grünewald paintings, several comprising of a number of panels. There are additionally thirty-five of his drawings known to be in existence. Much of his work was lost at sea in transport to Sweden as war booty.
Here is some of his work:
The Isenheim Altarpiece was painted between 1512 and 1516 and is on display at The Unterlinden Museum at Colmar, Alsace, in France. More information on the piece can be found on Wikipedia.