The Warburg Institute is well known to many occultists, especially Thelemites including initiates of O.T.O. as the repository of a large collection of Crowleyana including Freida Harris’ paintings for the Thoth Tarot Deck. Well, know it’s open to the general public. The Guardian just ran a profile on this venerable institution’s history, the upgrade the facility recently completed and suchlike.
Have a read: https://www.theguardian.com/artanddesign/2024/sep/25/occult-worlds-weirdest-library-warburg-institute.
Plan your visit: https://warburg.sas.ac.uk/.
