ONCE UPON A TIME<br /> 1994 Ongoing<br />Floor: American Prest-Plate Ceiling Tin Installed on Top of Gallery Floor Left for Viewers to Destroy through Abrasion with Actual Gallery Floor, Viewer Imprints, Tracks, and Traffic <br /> Variable Dimensions ONCE UPON A TIME<br /> 1994 Ongoing<br />Floor: American Prest-Plate Ceiling Tin Installed on Top of Gallery Floor Left for Viewers to Destroy through Abrasion with Actual Gallery Floor, Viewer Imprints, Tracks, and Traffic <br /> Variable Dimensions