Once upon a time, the Coudenberg Palace towered over the city of Brussels. Charles V and many other of the most powerful rulers ever to reign in Europe made this princely residence their home between the 12th and 18th centuries, until it was consumed by a terrible fire. Every trace of this prestigious palace simply disappeared underground for many years. Today, however, these ruins constitute a fascinating archeological site incorporating a network of underground passages and chambers. When you visit it you can explore the principal buildings of the palace and enjoy a stroll along the Rue Isabelle, which is now underground. In the Coudenberg Museum, located in Hoogstraeten House, the finest of the archeological discoveries made during the various excavations of the Coudenberg site are displayed.