Prince Rainier III and his family (minus Stephanie)
Here are the members of the royal family of Monaco, about 1964. At top is Prince Rainier III, and seated is his wife, Princess Grace. (An Oscar-winning actress, she was formerly known as Grace Kelly.) Standing are Prince Albert (left) and Princess Caroline (right). Prince Albert later succeeded Prince Rainier as the ruler of Monaco. Though the photo is undated, it does not include Princess Stephanie, who was born on February 1, 1965. Princess Caroline was born in 1957, and Prince Albert was born in 1958, so a date of 1964 would make them 7 and 6 years old, respectively, which looks about right.