Jan. 31, 1952 - London, England, U.K. - The elder daughter of King George VI and Queen Elizabeth, ELIZABETH WINDSOR (named Elizabeth II) became Queen at the age of 25, and has reigned through more than five decades of enormous social change and development. PICTURED: QUEEN ELIZABETH II and PRINCE PHILIP Duke of Edinburgh walking the streets of London. (Credit Image: © Keystone Press Agency/Keystone USA via ZUMAPRESS.com)