late 15th & early 16th-century) was a legendary Renaissance alchemist, claimed possessor of the philosopher's stone and teacher of Paracelsus.
These tales, according to historian of religion J. Peter Södergård, had little value other than providing an "aura of historicity" to the texts attributed to him.
He is said to have begun his interest in alchemy when observing an alchemist and miner named Flocker perform an alchemical operation that allegedly transmuted lead into gold.
He found only frauds and fools claiming to have transmuted base metals into silver and gold, which put him off his search for some time.
Having abandoned his search, he came to a college in Venice where he met a German alchemist named Tauler.
He followed in a medieval Christian tradition of alchemists reporting their travels to the East, where they learned ancient and esoteric secrets of alchemy.