Joseph Karl Stieler

Joseph Karl Stieler (November 1, 1781—April 9, 1858) was a German painter. Born in Mainz to a family of engravers and die-cutters, Stieler received some artistic training from his father, August Friedrich Stieler (1736-1789). Stieler began his career as a painter of en:miniatures. His portrait style was most especially shaped during his work in the Parisian atelier of François Gérard, a student of Jacques-Louis David.

Reference:
http://commons.wikimedia.org/wiki/Joseph_Karl_Stieler