Over a period of two decades, Raymond D. Nasher, a Dallas-based real estate developer, and his late wife Patsy amassed a collection of significant modern sculptures. For years, pieces from the private collection--numbering over 300 as of 1990--were on display in various museums and civic institutions, and they were installed on a rotating basis at Northpark Center, a Dallas shopping mall developed by Nasher. Since the 1987 Dallas Museum of Art exhibition, the collection has been shown in several major international museums. This study documents the formative period of the collection, the Nashers' collecting and exhibiting philosophies, and four early exhibitions of the sculptures. It includes a chronology of the Nashers and major acquisitions of sculpture.