The Tower of London, nestled on the banks of the River Thames, is an 11th-century castle that has been used for a variety of purposes over its long history. Since it was the most secure fortress of the time, the British royal families preserved their treasures in its chambers. The Tower of London was also a royal residence as well as a dreadful prison where many people, including some members of the royal family, were house-arrested and executed. Regardless of the purposes for which the...