Karl Caspar (13 March 1879 – 21 September 1956) was a German painter who lived and worked mainly in Munich.
In 1913, he was a founding member of the artists' association Münchener Neue Secession, to which painters like Alexej von Jawlensky, Adolf Erbslöh, Wladimir von Bechtejeff, Paul Klee, and Alexander Kanoldt also belonged.
A high point of Caspar's work was the Passion Altar of 1916/1917, housed in the crypt of the Frauenkirche.
Thereafter, his Christianity-inspired paintings and drawings, influenced equally by Impressionism and Expressionism, were removed from German museums and public collections and/or destroyed, and he was forced to retire from his teaching position.
His students include Joseph Loher and Gretel Loher-Schmeck, who belong to the Lost Generation, Fred Thieler and Richard Stumm and Peter Paul Etz.