How was Henri Lehmann related to Georges Seurat?

Henri Lehmann was a French painter and a significant figure in the art world during the late 19th century. He was a teacher and mentor to Georges Seurat, the founder of the Pointillist movement. Lehmann's influence helped shape Seurat’s artistic development, particularly in techniques related to color and composition. Their relationship reflects the mentorship and artistic exchange that characterized the Parisian art scene of the time.