The Drudenhaus (also known as Malefizhaus, Trudenhaus, Hexenhaus, and Hexengefängnis) was a famous special prison for people accused during the Bamberg witch trials.

The prison was constructed in 1627 on the order of Johann Georg Fuchs von Dornheim, Prince Bishop of Bamberg, and closed in 1632.

The Bamberg Drudenhaus was not unique: smaller Drudenhäuser of the same kind were built also in Zeil am Main, Hallstadt and Kronach, but it was the biggest and most famous.

An inscription on the portal read: Discite justitiam moniti ET NON TEMNERE Divos (from Vergil's Aeneid: "Let it be a reminder of justice from which the gods cannot ignore").

On 11 February 1632, when the Swedish army marched toward Bamberg to take the city during the Thirty Years' War, officials closed the prison and released the prisoners of the Drudenhaus on condition that they agreed to keep silent about the torture inflicted upon them during their imprisonment.