Franz Marc
Halpin has made claims for restitution on a number of other paintings by German expressionists, including "The Little Blue Horse" (1911) and "Cat Behind A Tree" ("Katze hinter einem Baum (Kinderbild)") by Franz Marc, held by the Staatsgalerie Stuttgart and Sprengel Museum respectively; "Barefoot Church I" (1924) by Lyonel Feininger, also held by the Staatsgalerie; and "Judgment Of Paris" (1913) by Ernst Ludwig Kirchner, held by the Wilhelm Hack Museum.