The Connecticut Historical Society is a private, non-profit organization that serves as the official statewide historical society of Connecticut. Established in Hartford in 1825, the CHS is one of the oldest historical societies in the US.The Connecticut Historical Society is a non-profit museum, library, archive and education center that is open to the public. The CHS houses a research center containing 270,000 artifacts and graphics and over 100,000 books and pamphlets. It has one of the largest costume and textile collections in New England.