Monolith #1, bronze, 1986, 21” x 7.5” x 8.25”, edition of 6, availableColumn #1, marble, 1981, in the collection of the Saginaw Museum of Art.Column #2, marble, in the collection of General Electric Corp.Monolith #6, Cast stone over a foam core, 2011, 35” x 13” x 16”, available