Historical document

Historical documents are original documents that contain important historical information about a person, place, or event and can thus serve as primary sources as important ingredients of the historical methodology. Many documents that are produced today, such as personal letters, pictures, contracts, newspapers, and medical records, would be considered valuable historical documents in the future. However most of these will be lost in the future since they are either printed on ordinary paper which has a limited lifespan, or even stored in digital formats, then lost track over time.