The Baltimore Architecture Foundation, in partnership with AIABaltimore, present the third annual Doors Open Baltimore! Learn about Charm City’s fascinating history through its architecture and the people who design and preserve it. Visit our Info Hub at the Maryland Historical Society the morning of the event to pick up your printed map and brochure to plan your self-guided tour. Free admission to over 50 buildings, rain or shine! Guided tours and Kid-Friendly activities will be available. Found in over 60 Sites throughout Baltimore City.