Portrait of Margarete von Soist

Franz von Soist was a doctor in Ehrenbreitstein, on the opposite side of the Rhine from Coblenz. He and his wife were most likely members of the local Catholic haute-bourgeoisie, from whom many of Ittenbach's portraits were commissioned.

In the portrait of Franz von Soist's wife, Ittenbach included the central panel of the Stefan Lochner altarpiece in Cologne cathedral.