Michigan Bell and Western Electric Warehouse
The terra-cotta used on the tower and top edges of the building's lower sections may be seen clearly here.
Note how the exterior piers on the tower are stepped. There is a miniature pier over the angled arch, which is a bit higher than the flanking piers. The Penobscot Building once had a similar stepped arrangement atop the two projecting wings on the building's east and west sides (about ten floors down from the top), but the pieces which formed the mini-piers were removed sometime in the forties or fifties.