#1. The famous Tower of London was built as a fortress by William the Conqueror. Early in the Middle Ages the kings used it as a palace; later on it was turned into a prison, but only distinguished prisoners, including statesmen and princes, were held there. Today the Tower is a national museum, where, among other things, the jewelry of the English kings and queens is on display. It is obvious from the passage that the functions of the Tower of London_______________.