(May 13, 1814 - March 13, 1884) was a Polish painter and art critic of Jewish descent. Lesser specialized in Polish historic and contemporary themes. He was a member of Krakew Academy of Learning and co-founder of Warsaw's Zachęta, the Society for Encouragement of the Fine Arts.
Lesser studied painting at Warsaw University's department of fine arts, as well as at art schools in Dresden and Munich. He was a founder of the history-painting movement in Poland, which is considered a part of the "archeological trend" that existed before Jan Matejko. The trend's purpose was to portray the entire history of Poland in works of art.