Join or Renew with a Joint Membership By choosing a joint membership with the Maryland Center for History and Culture, you are getting the best of two worlds. Enjoy exclusive access to MCHC and the historical organization of your choice. Join or Renew a Joint MCHC & MGS Membership Learn more about adding the Maryland Genealogical Society (MGS) to your Maryland Center for History and Culture membership. Join or Renew a Joint MCHC & HSMC Membership Learn more about our joint membership program with Historic St. Mary’s City (HSMC). Join or Renew a Joint MCHC & HSBC Membership Learn more about our joint membership program with Historical Society of Baltimore County (HSBC). Join or Renew a Joint MCHC & PGCHS Membership Learn more about our joint membership program with Prince George’s County Historical Society (PGCHS). Please contact the Advancement Team, at membership@mdhistory.org, or 410-685-3750, ext. 319, for more information.