What is the X in X-mas?
The empire of Britain, which began in the sixteenth and seventeenth centuries with the establishment of colonies in North America and ended in the twentieth century as dozens of nations, formerly British possessions, became independent. At the empire's greatest extent, around 1900, it included Australia, Canada, India, New Zealand, vast portions of Africa, and many smaller territories throughout the world. The empire ceased to have an “emperor” in the late 1940s, when the British king renounced the title of emperor of India. The empire has been succeeded by the British Commonwealth, which was formed in 1931.