Last week, Interactive Architecture ran an article about the Singing-Ringing Tree sculpture in Burnley, Lancashire, UK. The video resonated very much with some of my recent thinking on how public art that is part of the commons can be at the heart of community economic development. First of all, it reminded me of an interview of Douglas Rushkoff about his latest book Life Inc where he tells the story of how Middle Age cathedrals were built: The Vatican and central Rome did NOT build the cathedrals. The funds came from local currency. They were what we would now call “demurrage” currencies that were earned into existence. Towns ended up creating more value than they knew what to do with! They started investing in their…