Amassed by Frederick Hill Meserve with the help of his daughter Dorothy Meserve Kunhardt, the collection contains more than 73,000 items, including 57,000 photographic prints, as well as thousands of books, pamphlets, maps, and theater broadsides. These materials document American history from the Civil War through the end of the 19th century and record the emergence of photography as a distinctive cultural practice. The collection’s significance also lies in the tens of thousands of portraits of American politicians, army officers (of both the Union and Confederate forces), writers, actors, singers, scientists, African Americans, and Native Americans.