The Pfaltz is one of the most curious fortified construction in the world. Built at the begining of the 14th century by Lewis the Babvrian for purpose of levying tolls on the Rhein, this island fortress was only once conquered inthe autumn of 1504, Landgrave William of Hesse tricked and overcame the Spanish occupying forces with the help of a young girl, "little Elsa of Caub". Disguised as a lansquenet, she polited the attacking troops through the straits of the river.