Karl August Krazeisen (28 October 1794 Kastellaun[1] – 27 January 1878 Munich) was a Bavarian soldier, philhellene and portraitist.

In 1826, having by then promoted to lieutenant, along with 11 other Bavarians he was sent to Greece, where the Greek War of Independence was going through a critical phase, after the troops of the Ottoman Sultan had received assistance from his vassal Muhammad Ali of Egypt.

It was the first public action to support the Greek struggle, taken by another European state, as Bavarian King Ludwig I was an ardent philhellene.

[2][3] Under the command of Charles Nicolas Fabvier, Krazeisen took part in the operations from November 1826 till April 1827 (Siege of the Acropolis and Battle of Phaleron).

Krazeisen was not a professional artist, but having the ability to draw, he used his stay in Greece to create portraits of the heroes of the war, the sketches of camps, costumes, uniforms, battle plans.