On September 13, 2021, Queen Letizia attended the opening of the exhibition "Forty Years of Friendship. Donations from the Fundación Amigos del Museo del Prado" held at Museo del Prado in Madrid. The exhibition takes place on the occasion of the 40th anniversary of "The Friends of the Prado Museum Foundation" which is a private non-profit cultural institution established on the initiative of a group of historians in 1980.