In October 1921, Otto Dix came to Düsseldorf at the invitation of Johanna Ey and Hans Koch, where he sold the latter two works and received his first portrait commission from him. He worked in the Koch house and the result was the unflattering portrait of Dr. Hans Koch. A love affair quickly developed between Martha Koch and Otto Dix, which culminated in the fact that she went to Dresden with him for a few months before returning to Düsseldorf. Hugo Erfurth's photographs from Dix's circle of friends in Dresden were taken during this early period.
