A look back at Beatrix's reign as her 75th birthday portrait is revealed
In 1980, Beatrix's mother, Queen Juliana, made the surprise announcement that, after 31 years on the throne, she was abdicating in favour of her eldest daughter.
"As one gets older one realises sooner or later that one's powers decrease and that one cannot fulfil one's duties as before," she told the nation in a televised address.
Beatrix was crowned Queen during a coronation service on 30 April 1980. She is the longest reigning monarch of the Netherlands