Published to accompany the Hirshhorn Museum's exhibition of 39 works by 16 artists--acquired from the renowned collection of Count Giuseppe Panza di Biumo, one of the foremost collectors of twentieth-century American and European contemporary art--"The Panza Collection" features the work of such seminal artists as Robert Barry, Hanne Darboven, Robert Irwin, On Kawara, Joseph Kosuth, Sol LeWitt, Bruce Nauman and Lawrence Weiner. Dr. Panza distinguished himself by collecting Conceptual, Light and Space, Minimal and Environmental art when few museums or private collectors were willing to take the risk, and for concentrating his efforts on obtaining multiple pieces from the best period of an artist's career. Dr. Panza's contribution to this publication offers insights into his collecting philosophy. An essay by Hirshhorn Associate Curator Evelyn C. Hankins sheds light on prevailing artistic practices of the late 1960s and early 1970s and establishes the significance of these important works.