This is a documentation of a sculptural performance installation mounted at Arthur St. Gallery in 1978. The culmination of a one-year preparation period involving study, weightlifting, yoga, and aerobics, this piece was a forerunner of contemporary endurance performances. During a one month period, Poruchnyk planned and executed the casting of 12 six-inch concrete slabs, which were then assembled into a cube. With his engaging manner, Poruchnyk was able to transform skeptical viewers into enthusiastic assistants. Cube questions the ideas of permanence, change and heroic effort in the face of great odds.