Photograph courtesy of Schwartz Silver Architects.The expansion of the Alida Carroll and John Marshall Brown Library, the research library of the Maine Historical Society, is the first phase of Schwartz/Silver’s master plan for the institution. The 1907 library has been restored, and will be linked to a future museum by a corridor under the garden. At the rear of the old building, a 1960’s addition has been removed, and a new three-story wing takes its place. The new wing houses rare books in compact storage and a temperature and humidity controlled conservation environment. Behind the glassy west façade, large movable wood shutters modulate the light into the offices and meeting rooms that overlook the historic Longfellow garden.