Installed on the south side exterior of Philadelphia’s Independence Visitor’s Center in 2003, Alison Sky’s Indelible is a site-specific, narrative work intended to create awareness about American history that has gone undisclosed. The artwork is a stucco relief of a townhouse facade, overlaid with glass that contains text about the condemnation of slavery that was edited out of the original draft of the Declaration of Independence by Congress in 1774. The text about slavery appears blurry, as if erased, but is revealed as the viewer moves.