This is the altar piece from the Stadtkirche St. Peter und St. Paul in Weimar, Germany.  It was begun by Lucas Cranach the Elder in 1552/53, shortly before his death, and completed in 1555 by his son Lucas Cranach the Younger.

The composition of the central panel of the Weimar altarpiece is dominated by the representation of Christ on the cross. The crucifixion is positioned in the center foreground and divides the image in two halves. The first pictorial plane is occupied by four figures depicted in a meadow full of flowers. On the left Christ is shown triumphing over Death and the Devil who lie on the ground under his feet.

A complete description of this beautiful artwork can be found in the Lucas Cranach digital archive from the Stiftung Museum Kunstpalast, Düsseldorf Germany