Mercatellis’ Compilation on Natural and Occult Science

The Forbidden Power of a Book
September 27, 2018

The mysterious Le trésorier de philosophie naturelle des pierres précieuses includes texts forbidden by the Church and suspected of containing illicit powers. The manuscript belonged to Raphael de Mercatellis, the powerful Abbot of St. Bavos and one of the most important Renaissance bibliophiles of the Low Countries. It is composed of separate sections comprising fascinating texts that illustrate Mercatellis' medicinal, Platonic, and occult interests. 


Please also read our blog posts on this manuscript. 




Please contact us with any inquiries:


Tel. +41 61 275 75 75

We are open Monday to Friday, 9 a.m. to 6 p.m.


Office and research in Basel:

Dr. Jörn Günther Rare Books AG
Spalenberg 55
4051 Basel Switzerland 


Visitors are welcome by appointment.


We are closed for the holidays from 23st December 2022 to 2nd January 2023.


For press information please contact Sara on 
To subscribe to our newsletter, click here.