Ingolstadt, Bavaria

Ingolstadt is in the center of Bavaria, Germany.

Historical
It is the birthplace of Adam Weishaupt, where he founded the Illuminati in the late 18th century.

Conspiratorial
It is a pivotal location in The Illuminatus! Trilogy. It is the location of the Walpurgisnacht Concert that is central to the events of Leviathan, the third book of the Trilogy.