Elizabeth II (Elizabeth Alexandra Mary; 21 April 1926 – 8 September 2022) was Queen of the United Kingdom and other Commonwealth realms from 6 February 1952 until her death in 2022. She had been the regnant queen of 32 sovereign states during her lifetime and was the monarch of 15 realms at her death. Her reign of 70 years and 214 days is the longest of any British monarch, the second-longest of any sovereign state, and the longest of any queen regnant in history. When her father died in February 1952, Elizabeth, then 25 years old, became queen of seven independent Commonwealth countries: the United Kingdom, Canada, Australia, New Zealand, South Africa, Pakistan, and Ceylon, as well as head of the Commonwealth. Elizabeth reigned as a constitutional monarch through major political changes. As queen, Elizabeth was served by more than 170 prime ministers across her realms. We remind you of her with a 1^st class stamp…