History Colorado's incomparable collections—from books and manuscripts to artifacts and photographs—encapsulate the rich history of this state and help us understand the present in the context of the past.
The book collection contains approximately 30,000 titles, many held only by History Colorado.
Business records, personal papers, diaries, and letters of famous, and little-known, individuals provide insight into Colorado life.
The collection consists of thousands of maps ranging in size from a few square inches to rolled railroad maps many yards long.
Beginning with the April 1859 edition of the Rocky Mountain News, the collection contains over 1,700 microfilmed newspaper from towns across the state.
More than 750,000 photographs and 250,000 negatives reflect Colorado history from the earliest times to the present.
More than 1,500 journals and magazines published in Colorado and nationally.
Hard-to-find materials related to archaeology, architecture, and historic preservation.