Outside of these genealogies, comics theorists and historians have seen precedents for comics in the Lascaux cave paintings in France (some of which appear to be chronological sequences of images), Egyptian hieroglyphs, Trajan's Column in Rome, the 11th-century Norman Bayeux Tapestry, the 1370 bois Protat woodcut, the 15th-century Ars moriendi and block books, Michelangelo's The Last Judgment in the Sistine Chapel, and William Hogarth's 17th-century sequential engravings, amongst others. In Rome, what do historians consider to be a precedent for comics?