In a recent phone conversation, Olivia Gude of the Chicago Public Art Group (CPAG) expressed her opinion that when a site-specific piece of art needs repair, Americans take on an “either/or” mentality. The piece will either be restored or destroyed. In older areas of the world, a third alternative has been commonplace for centuries: adding something new to an older structure. Take the Basilica of St. Peter as an example. Begun by Michelangelo in the Renaissance, it was expanded and tweaked by other great architects as styles changed over time.  Recently, I have to admit I fell into the binary thinking that Gude has described. When reading the text next to The Spirit of Hyde Park mural at 57th Street and Lake Park Boulevard, I became confused.  “Restored and reinterpreted by CPAG,” it read. What did reinterpreted mean in the context of public art? Weren’t murals simply painted over or touched up over time? Taking in the wall, a mix of styles was evident. Bold, abstract patterns mingled with realistic depictions of students and protestors …