Most of MIT’s buildings are known not by name or by address, but by number. Building 10 is the iconic dome with the large grass courtyard stretching to the Charles river. Building 54 is the 295-foot tall, I.M. Pei-designed concrete block that looms over campus and from which pumpkins are dropped at Halloween. Building NW12 is the nuclear fission reactor.
On a Fission and Fusion Mission
