First vision of Hildegard von Bingen (1098-1179), assumed allowed under Fair Use.

 “The Glory of Psara” by Γύζης Νικόλαος (Nikolaos Gyzis) (1842 -1901), on exhibit at the National Gallery in Athens, assumed allowed under Fair Use.

“Standing Nude” by Guy Rose (1867-1925), image from WikiArt, assumed allowed under Fair Use.

Letter from Arghun (1258-1291), leader of Ilkhanate to Philip IV of France (1268-1314), written1289; image from Wikipedia, assumed allowed under Fair Use.

  “Mount Sinai” by El Greco (1541 – 7 April 1614), housed at The Historical Museum of Crete, assumed allowed under Fair Use.

 “Carnival of Mexican Life. Dictatorship” by Diego María de la Concepción Juan Nepomuceno Estanislao de la Rivera y Barrientos Acosta y Rodríguez (08 December 1886 -24 November 1957); image from the Palacio de Bellas Artes, Mexico City, Mexico, assumed allowed under Fair Use.

 “The Valley of the Nervia” by Claude Monet (14 November 1840 – 5 December 1926); image from the Metropolitan Museum of Art, assumed allowed under Fair Use.

  Image from Memgenerator, assumed allowed under Fair Use. I have no idea if the misspelling of “advice” is intentional.

 La Virgen alada del Apocalípsis (“Winged Virgin of the Apocalypse“) by Miguel de Santiago (17th century), assumed allowed under Fair Use.

 Section from a Qur’an, Iraq or Turkey, second half of 13th century, available at The Metropolitan Museum of Art, assumed allowed under Fair Use.