Caspar Isenmann was a Gothic painter from Alsace. As the municipal painter of his hometown Colmar and the creator of a major altarpiece for the prestigious St Martin's Church, he was an important representative of the Upper Rhenish school of painting of the mid-15th century and a probable master of Martin Schongauer.

Colmar is a city and commune in the Haut-Rhin department and Grand Est region of north-eastern France. The third-largest commune in Alsace, it is the seat of the prefecture of the Haut-Rhin department and of the subprefecture of the Colmar-Ribeauvillé arrondissement.