The Guest Critic is charged with suggesting a topic or theme that can be explored and debated for this special section of the Rail. On the occasion of the re-staging of Jenny Holzer’s 1989, architecturally encompassing piece at the Guggenheim, I have chosen the theme of site-specific Art. To my mind, Holzer’s Guggenheim project is one of the great site-specific works of my generation. It is also part of a larger history that has grown in some very interesting ways.