Abstract Painting No. 5' by Ad Reinhardt
"Most famous for his "black" or "ultimate" paintings, he claimed to be painting the "last paintings" that anyone can paint. He believed in a philosophy of art he called Art-as-Art and used his writing and satirical cartoons to advocate for abstract art and against what he described as "the disreputable practices of artists-as-artists"." https://en.wikipedia.org/wiki/Ad_Reinhardt
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