Irregular Tower is a large modular structure made of enamel on steel. The cubic construction, which repeats and brings into order a single unity, follows the principle of geometrical progression. It is a metal pyramid wherein the cube is the basic element and puts in play in all sorts of combinations from the most simple to the most complex. As a pioneer of Conceptual art, LeWitt once described his serialized use of the open-grid cube as a ‘grammatic device’: That is used not so much for its formal qualities as for its dialogue with art history