Maryland Digital Cultural Heritage About Maryland Digital Cultural Heritage (MDCH) is a collaborative, statewide digitization program headquartered at the Enoch Pratt Free Library/State Library Resource Center in Baltimore. Our program partners with Maryland libraries, archives, historical societies, museums, and other institutions to digitize and provide free online access to materials relating to the state's history and culture. Since the program began in 2002, MDCH's collections have grown to include over 5,000 items, such as maps, manuscripts, photographs, artwork, books, and other media. Tips for using our digital collections: