Arnaldus de Villa Nova (also called Arnau de Vilanova in Catalan, his language, Arnaldus Villanovanus, Arnaud de Ville-Neuve or Arnaldo de Villanueva, c. 1240–1311) was a physician and a religious reformer. He was also thought to be an alchemist (his house in Montpellier, France, had a carved door showing a roaring lion and dragon that bit his tail, also known as Ouroboros, both recognized alchemical symbols). The fact that several renown alchemists recognized him as an adept reinforces the thesis that he was an alchemist. He was also, like most wisemen of his time, an astrologer.