Ingolstadt, Bavaria

Ingolstadt is a pivotal location in The Illuminatus! Trilogy and also a real city in the center of Bavaria, Germany. It is the birthplace of Adam Weishaupt, where he founded the Illuminati in the late 18th century. Ingolstadt is the location of the Walpurgisnacht Concert that is central to the events of Leviathan, the third book of the Trilogy.