On June 28, 2021, Queen Letizia of Spain attended the opening ceremony of 'World Blindness Summitt Madrid'21' at the ONCE headquarters in Madrid. The Queen also gave a speech during the opening. The world's leading experts and organizations concerning visual disability, from 190 participating countries take part in the summit held by the ONCE Social Group from 28 to 30 June. The summit will also take place online.