The Spinning Cube: Regents' Plaza's 15-foot sculpture

Endover, or more commonly called 'The Cube,' is one of a series of monumental cubes by American abstract sculptor Tony Rosenthal. This 15-foot x 15-foot x 15-foot (4.6 m x 4.6 m x 4.6 m) cube, fabricated in black-painted steel, stands on its corner. Each face of the cube is split into four quadrants. The cube's spinning mechanism lets the 2,400-pound sculpture spin with relative ease.

Unlike its counterpart, Alamo in Astor Place, New York, which is on a separate platform, Endover's pivot is sunken into the ground. Tony Rosenthal, a 1936 graduate of the University of Michigan, created the first of his series of monumental cubes in 1967. Alamo was only meant to be a temporary installation. Alamo was so popular, it was kept in Astor Place, leading to the commissioning of Endover.

Endover was a gift to the University of Michigan from the Class of 1965 and the sculptor. It was installed in Regents' Plaza in 1968, permanently residing on the university's Central Campus, next to the Michigan Union. It is open for the public to enjoy. Endover was removed from public display from 2018 to 2019 due to the renovation of the adjacent Michigan Union.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons