On the photography blog Feature Shoot: An interview with artist John D'Agostino, who uses smashed stained-glass Tiffany windows from the 1930s as photographic negatives. D'Agostino's grandfather rescued the shards from the East River when Tiffany's studio was being torn down; the grime crusted on them from being stored away for 75 years now forms a crucial part of his imagery. "The layers of detritus on the surface of the glass have decomposed into wonderful biomorphic forms [that] combine with the layers of color underneath," he says. "This creates a dialogue between past and present."