The lady's colorful shawl is in the same general art design and "bright earth tones" coloring as the Madonna painting.
Steve emulates Jim Rockford's Jimmy Joe Meeker persona from "The Rockford Files"(1974).
Although it is not the art piece shown, the National Gallery of Art has had on display a Byzantine Madonna since 1949. The term Byzantine refers to the Byzantine Empire and specifically Christian Greek artistic influence, and does not actually refer to a specific art piece.