"The object of this Association shall be to secure the erection (and maintenance) in the city of Boston, of a Congregational House for the meetings of the body, the accommodation of its library, and for the furtherance of its general purposes; to found and perpetuate a library of books, pamphlets, and manuscripts, and a collection of portraits and relics of the past; and to do whatever else -- within limits of its charter -- shall serve to illustrated Congregational History, and promote the general interest of the Congregational Churches."