On January 21, Queen Margrethe, Crown Prince Frederik, Crown Princess Mary and Princess Benedikte attended the opening of the exhibition "A Queen’s Jewellery Box" at the Amalienborg Museum in Christian VIII’s Palace at Amalienborg. The exhibition was opened as part of the official programme of the Danish Royal House that was planned on the occasion of the 50th anniversary of Queen Margrethe's accession to the throne.