Although Feininger pursued photography as an artistic medium, he also recognized its usefulness as a tool for documentation. A vast number of the negatives and slides in this collection document his paintings, drawings, and watercolors, often at different stages in their production. These images are a fascinating resource for the study of his working process, and are frequently intriguing works of art in their own right. His practice of documenting his work was particularly distinct in Halle in the early 1930s, and in New York in the 1940s and ’50s.