 To date, the library holds more than 23,000 volumes on hermetica, Rosicrucianism, alchemy, mysticism, gnosis, esotericism and comparative religion, and has great scientific and artistic value.Other areas of the collection are Sufism, Kabbalah, anthroposophy, Freemasonry, Judaica and the Grail.There are around 4,500 manuscripts and books printed before 1800 CE, and around 17,000 books (primary and secondary sources) printed after 1800 CE.