Rathjens' collection includes over 2,500 Jewish ethnographical items. He offered Mrs. Hadassa Calvari-Rosenblit of the Jewish Agency in Palestine to buy from him the duplicates. She forwarded his offer to the Hebrew University, which bought from him almost 2,000 Items. Rathjens contributed much to preserve the Yemenite culture among the Yemenite Jews in Palestine. Exhibitions were made and lectures were given about the rich Yemenite Jewish culture, with a display of their costumes and jewelry.
