Historic Preservation advocacy nonprofit in Boston that is protecting places, promoting vibrancy & preserving character. #PreservationHub The Boston Preservation Alliance serves to protect the places, promote the vibrancy, and preserve the character that make historic Boston unique. The Boston Preservation Alliance is a nonprofit 501c3 organization that protects and improves the quality of Boston's distinct architectural heritage. Through advocacy and education, we bring people and organizations together to influence the future of Boston's historic buildings, landscapes, and communities.