Urbana, IL, 1942 -

Esfahan, Iran, 1971 -

Hartford, Connecticut, 1928 - 2007, New York, New York

Reading, Pennsylvania, 1958 - 1990, New York, New York

Pittsfield, Massachusetts, 1940 - 1995, New York, New York

Mexico City, Mexico, 1902 - 2002

Garessio, Italy, 1947 -

Ausburg, Germany, 1942 -

Piraeus, Greece, 1936 - 2017, Rome, Italy

Dresden, Germany, 1932 -

Santa Clara Pueblo, New Mexico, 1989 -

Linz, Austria, 1940 -