My great3 grandfather Samuel Leopold Landmann practiced medicine in Duben, Brandenburg, Prussia (Germany) in the early 1800s. He was married to Charlotte Beuckner. My great2 grandfather Anton (born 1817), a teacher, emigrated to Odessa, Russia, and later to the United States. Except for a reference in the Goethe archives about buying a painting from J.W. von Goethe in 1804, I have no other information about Samuel Leopold Landmann and would like more.