Ruth Zickel was the daughter of Nadja and Frederic Zickel, German Expressionist dealers in Munich. In 1939 she came to the United States, where she met Leopold Blumka of the Blumka Gallery in New York. The Blumka Gallery had been established in Vienna in the 1880s and moved to New York in the late 1930s, specializing in Medieval, Renaissance, and Baroque art. In 1942 Blumka and Ruth married, and she joined the Blumka gallery, which still operates on East 72nd Street in New York City under the directorship of Tony Blumka.
Reif, Rita. "Ruth BLumka, 74, an Art Dealer and Donor to Many Museums," The New York Times, 12 October 1994
Moonan, Wendy. "A Family's Affair with the Renaissance," The New York Times, 27 January 2006.