In Family Guy, when Brian and Stewie go to the museum to look at a painting, what is that from?

The reference is to the movie Ferris Bueller's Day Off The song accompanying this segment is the original from the film, an acoustic cover version by The Dream Academy of “Please, Please, Please Let Me Get What I Want” by The Smiths. The painting itself is called, A Sunday Afternoon on the Island of La Grande Jatte, by Georges Seurat.