Ukraine-born Tschlenow was a physician and speaker for the Zionist cause who vocalized support for major land purchases in Palestine. He led the walkout from the Sixth Zionist Congress after it voted to support the Uganda Plan. He served on the Palestine Zionist Executive and laid the cornerstone for the Technion in 1912. He assisted Jewish refugees during World War I, then helped negotiate Britain’s Balfour Declaration.
Photo: Jerusalem Academy of Medicine via U.S. National Library of Medicine