William S. Heckscher
In 1932–1933, Heckscher lived in New York where he worked as Panofsky's assistant. During this time, he enrolled in the Graduate Department of Art History at the Institute of Fine Arts at New York University to study American art history. Heckscher returned to Germany to continue his studies in 1934. He and his mother were detained by the Gestapo and interrogated for ten days after being accused of having pacifist connections.
Winthrop Pickard Bell
He was born in Halifax, Nova Scotia and educated at Mount Allison University, McGill University, Harvard University (where he studied under Josiah Royce, about whose theory of knowledge he was later to write his doctoral dissertation), the University of Leipzig, and finally at the University of Göttingen (where he completed his doctoral studies under Edmund Husserl).
Edith Stein was among his friends during his Göttingen period.