In a grey stone cliff-top cathedral lipping the Mediterranean, Prince Rainier III ascended his throne as supreme ruler of the 2,200 people and four and a half square miles of Monaco. The Prince hands his fanion to the Colonel of his Army outside the Palace. Photographed during the Te Deum held in Monaco Cathedral on Tuesday to mark the accession of Prince Rainier . Left to Right (front row) Princess Antoinette; the Prince's mother, Princess Charlotte; Prince Rainier; his father, Prine Pierre, and Princess Chislaine. 13th April 1950