Bookcase is one of two identical, free-standing sculptures with the same title by Pistoletto in Tate’s collection (T12190–1). Each comprises a floor-standing iron framework supporting five evenly spaced shelves. Together the framework and the shelves form a single unit that takes the shape of a huge, upturned bow. Thus the unit is widest at the top and bottom (the upper and lowest shelves measure 120cm), and narrowest at the centre (the middle shelf measures just over 60cm). It is coated with blue-green metallic enamel paint. T12190 and T12191 are designed to be displayed next to one another against a wall, or at right angles to one another in a corner.