Explore Hundreds of Pre-1800s Occult Texts With This Sprawling Online Database
After the tremendous success of his 2003 thriller The Da Vinci Code, Dan Brown turned his attention to his next set of novels in the series. While writing The Lost Symbol and Inferno, the novelist regularly visited the Ritman Research Institute in Amsterdam, where he had access to some of the world’s strangest and most fascinating occult texts. By 2016, Brown had pledged €300,000 (about $368,000)











































































