These source materials are thought to have appeared between 1400 and 1800 CE.

Brethren of the Free Spirit (15th Century)

Clues about a heretical sexual practice from the Middle Ages.

Ornament of Stainless Light by Khedrup Norsang Gyatso (15th Century)

Tibetan classic written by a teacher of the Second Dalai Lama.

The Rosary of the Philosophers (Rosarium philosophorum sive pretiosissimum donum Dei) (16th Century)

Image series from an alchemical treatise.

The Legend of the Great Stupa by Guru Padmasambhava (~1700)

Tibetan legend that instructs the visionary along the spiritual path.