The centre piece of St. Mary’s square/park in Stockholm is a brass sculpture group in a fountain, sculpted by Anders Wissler and put in place in 1903. It depicts the god Thor at the moment when he’s fished the Midgard serpent up to the ocean surface and prepares to whack it in the head with his hammer. The serpent looks like a standard-issue Medieval dragon. But to either side of it are smaller lizard-like beasts that are clearly modelled after late-19th century palaeontology’s ideas about dinosaurs. One is a plesiosaur. The other one, I don’t know, but it’s got a cylindrical snout, crocodile teeth and snorts water through its nostrils.