 His main contribution during the Weimar period was a German–Romanian Chamber of Commerce.Entirely his "brainchild", it was established in November 1929 with funds pooled by Danatbank, Deutsche Bank, Dresdner Bank, Krupp, and Otto Wolff.As a partisan of Titulescu's policies, Comnen was in favor of normalizing Romanian–Soviet relations, attempting to settle the issue of Bessarabia.