Alchemy

Alchemy is an ancient branch of natural philosophy, a philosophical and protoscientific tradition that was once practised in China, India, the Muslim world, and Europe. In its Western form, alchemy is first attested in pseudepigraphical texts written in Greco-Roman Egypt during the first few centuries AD. Greek-speaking alchemists often named their craft "the Art" (τέχνη) or "Knowledge" (ἐπιστήμη)... (Wikipedia)