In 1885, he moved to Munich where he met Friedrich Thiersch and Gabriel von Seidl and where - after two study trips to Italy and Paris - he established himself as a free architect. Littmann excelled in the erection of magnificent buildings, e. g. theaters, department stores and spas and was the perfect supplement to Heilmann, who had specialized in living house construction. His pedigree doesn't give any clue on the often referred Jewish descent, rather he is descended from a Protestant family in Oschatz , which can be traced back for centuries.