Just as the development of earth art and installation art stemmed from the idea of taking art out of the galleries, the basis of my involvement with public art is a continuation of wall drawings.

All of the significant art of today stems from Conceptual art. This includes the art of installation, political, feminist and socially directed art.

Conceptual art became the liberating idea that gave the art of the next 40 years its real impetus.

I was not interested in irony; I wanted to emphasize the primacy of the idea in making art.

Also, since art is a vehicle for the transmission of ideas through form, the reproduction of the form only reinforces the concept. It is the idea that is being reproduced. Anyone who understands the work of art owns it. We all own the Mona Lisa.

Minimalism wasn't a real idea - it ended before it started.