Robert Mapplethorpe photographs in a spread from Interview magazine, March , in the Robert Mapplethorpe archive. A professor of history at Duke University and a theorist of sexuality and gender, scholar Pete Sigal recently visited the Getty Research Institute to study materials in the Robert Mapplethorpe archive. We invited him to share his discoveries with our readers. The beautiful, muscled ass of pornography star Thomas Williams greeted the readers of the March issue of Interview magazine fig. When I entered the Getty Research Institute to examine the Robert Mapplethorpe archive, I expected to find salacious photographs and perhaps some steamy correspondence.