The Aurora consurgens is an illuminated manuscript of the 15th century in the Zürich Zentralbibliothek (MS. Rhenoviensis 172). It contains a medieval alchemical treatise, in the past sometimes attributed to Thomas Aquinas, now to a writer called the “Pseudo-Aquinas”. Unusually for a work of this type, the manuscript contains thirty-eight fine miniatures in watercolour. The illustrations are allegorical representations of alchemical elements depicted in human or animal form. For example, mercury is depicted as a serpent;gold as the Sun and silver as the Moon.