Aaron Siskind's *Chicago 25* is a striking gelatin silver print that exemplifies his signature approach of isolating abstract forms found in the urban environment. The photograph transforms weathered surfaces, peeling paint, or architectural fragments into bold, graphic compositions that blur the line between photography and abstract expressionist painting. Siskind's masterful use of light and shadow creates a powerful tension between texture and form, inviting viewers to see the ordinary world in an entirely new way.