Otto Piene serves as artist-in-residence at the Graduate School of Fine Arts at the University of Pennsylvania replacing Piero Dorazio who is in Europe. Piene is there for four years before going to MIT as a Fellow at the Center for Advanced Visual Studies and later its Director.  In the summer 1964, Piene participates in Documenta for the second time. An invitation by Sam Green to show his work results in the first Zero Group exhibit in the United States.