Der Teufelstritt (The Devil’s Footprint)
According to legend, in 1468 architect Jorg von Halspach went looking for money to build a new cathedral in Munich and ended up making a bargain with the Devil: the Devil would provide the funds for the huge building on the condition that it be a celebration of darkness, with no windows to let in light.
When the building was complete, von Helpach led the Devil inside to survey his work, and to show him that he had held up his end of the bargain. Although there was light, there seemed to be no windows, and the devil was satisfied. But then when he took another step further, the columns that had been blocking the view of the windows opened up and, in his fury at being tricked, he stamped his foot, forever marking the floor with his black footprint.