Royal addresses are the titles and forms of address used to refer to members of a royal family. SIRES is an acronym for Sovereign, Imperial, Royal, Elected, and Selected, which are the five categories of royal addresses. Sovereigns are the highest ranking members of a royal family, such as kings, queens, and emperors. Imperial titles are given to those who have been granted imperial status, such as the Emperor of Japan. Royal titles are given to members of a royal family, such as princes and princesses. Elected titles are given to those who have been elected to a position of power, such as the President of the United States. Finally, selected titles are given to those who have been chosen for a position of power, such as the Pope.