Albrecht Altdorfer (c. 1480 – February 12, 1538) was a German painter, engraver and architect of the Renaissance working in Regensburg. Along with Lucas Cranach the Elder and Wolf Huber he is regarded to be the main representative of the so-called Danube School setting biblical and historical subjects against landscape backgrounds of expressive colours. As an artist also making small intricate engravings he is seen to belong to the Nuremberg Little Masters.

The remains of Altdorfer's surviving work comprises 55 panels, 120 drawings, 125 woodcuts, 78 engravings, 36 etchings, 24 paintings on parchment, and fragments from a mural for the bathhouse of the Kaiserhof in Regensburg. This production extends at least over the period 1504–1537. He signed and dated each one of his works.