Bibliotheca Philosophica Hermetica (BPH) or The Ritman Library, founded by Joost Ritman in 1984. The library holds more than 28,000 volumes on Hermetica, Rosicrucianism, Alchemy, Mysticism, Gnosis & Esotericism and Comparative Religion, and has great scientific and artistic value. The library is situated in museum Embassy of the Free Mind in the House with the Heads (Keizersgracht 123) in Amsterdam and is a non profit organisation.The mission is to share universal wisdom.