On January 29, 2009 the American Physical Society designated Pupin Hall and the Columbia Physics Department as a Historical Site, in recognition of II  Rabi and the discovery of magnetic resonance. The designation is commemorated by the plaque mounted on the left hand side of the north  wall of the Pupin lobby.

Gene Sprouse, APS Editor in Chief, presented the award on behalf of  the Physical Society and Executive Vice President David Hirsh received it on behalf of the University.  The American Physical Society was founded at Columbia in May 1899.

Photos: Courtesy of David Wentworth

Gene Sprouse, American Physical Society Editor in Chief, presenting the award on behalf of the Physical Society. 

David Hirsch, Columbia University Executive Vice President for Research, accepting the award on behalf of the university.

From left to right: Professor John Rigden, Washington University and APS Historian, Gene Sprouse, APS Editor in Chief, Nancy Rabi Lichtenstein, Margaret Rabi Beels, Vice President David Hirsh, Immaneul Lichtenstein.

Signing the Register of the American Physical Society: Andrew Millis, Chair, Department of Physics, Executive Vice President for Research David Hirsh, American Physical Society Editor in Chief Gene Sprouse, John Rigden.