Office space for lease. Landmark building in the heart of downtown Cambridge. Significant upgrades to building systems and common areas. New hallways, bathrooms, lighting, HVAC and elevators. More upgrades in the works. Spaces range from below 646 square feet to 17,266 square feet for a full floor. Also available 2,963 square feet (approximate) on the ground floor. Rent is $9.00 per RSF Net in the tower and $11.00 RSF Net on the ground floor.