Above: "Philosophy of the 10th Muse", by Joaquín Torres García.
Below: Picture 1 is "Face of the Great Masturbator", by Salvador Dali.
Picture 2 is "The Enigma of Hitler", by Salvador Dali.
Picture 3 is "Park" by Agnes Martin in 1965. If she says so.
Picture 4 is "The Gathering", by Ángeles Santos.
Picture 5 is "Self-Portrait", by Alfonso Ponce de León, who does not seem to have warm feelings towards himself.
Picture 6 is a carving of either a wrestling match or a romantic encounter. Or both.
Pictures 7 and 8 are outside views of the eastern entrance to the Reina Sofia Museum.