Conceptual artist Jenny Holzer is set to unveil a new work tonight in Pittsburgh that highlights text from three authors with ties to the city. The display will feature words written by Annie Dillard, John Edgar Wideman and Thomas Bell. According to the New York Times, the installation "uses more than 1,500 light-emitting diode tubes to scroll the texts 24 hours a day, 7 days a week, in letters 36 inches high and 11 inches wide, along two edges of the roof, each nearly 350 feet long." Holzer's work has taken the written word and transformed it into a larger than life display that works on many different levels -- as art, as literature, as social conscience. You can also check out a Jenny Holzer online project "Please Change Beliefs" (interactive, naturally) here.