According to AFP:
…the royal diadem worn by Kate Middleton at her wedding [and] hundreds of glimmering treasures go on show this week in a major Paris exhibit…running until February 16 under the famous glass roof of the Grand Palais exhibition hall…
Queen Elizabeth II…made available the tiara…which the queen lent to Prince William’s bride for their wedding last year.
Known as the “Halo” and set with 739 brilliant and 149 baton diamonds, it was bought by George VI before his coronation for the Duchess of York, now the Queen Mother, who presented it to Elizabeth on her 18th birthday.
