Mr. Golestan’s original prints remained in his archive until about two years ago. Vali Mahlouji, a London-based curator and a distant cousin of Mr. Golestan’s widow, Hengameh, who is also a photographer, sought them out to create a complete archive of Mr. Golestan’s work. By the 1970s, about 1,500 prostitutes worked, and most of them lived, in the Citadel.