Angola is a 1968 Cor-ten steel sculpture by Isaac Witkin, installed on the Massachusetts Institute of Technology (MIT) campus, in Cambridge, Massachusetts, United States.

https://en.wikipedia.org/wiki/Angola_(Witkin)

Angola

Hayden Memorial Library

Lipchitz Courtyard

Sacrifice III

TV Man or Five Piece Cube with Strange Hole is a 1993 mountain rose colored granite and steel sculpture by David Bakalar, installed on the Massachusetts Institute of Technology (MIT) campus, in Cambridge, Massachusetts, United States. The five abstract, organic elements of the sculpture reflect the influences of Constructivism and Surrealism on the artist's style. The geometric forms use negative space to help compose an anthropomorphic ensemble.

https://en.wikipedia.org/wiki/TV_Man_or_Five_Piece_Cube_with_Strange_Hole

TV Man or Five-Piece Cube with Strange Hole