People react after learning of the death of the world's longest reigning monarch, Thailand's King Bhumibol Adulyadej, on October 13, 2016 in Bangkok, Thailand.
Catherine, Duchess of Cambridge opens the Magic Garden playground at Hampton Court Palace in London on May 4, 2016.
Sweden's King Carl XVI Gustaf and Queen Silvia arrive at the Nordic Museum in Stockholm on April 29, 2016 for a concert performed by the Royal Opera and the Stockholm Concert Hall to celebrate the king's 70th birthday.
King Felipe VI and Queen Letizia of Spain attend the Cervantes Prize award ceremony on April 23, 2016 in Alcalá de Henares, Spain.
King Willem-Alexander of the Netherlands (right) welcomes Indonesian president Joko Widodo at Noordeinde Palace in The Hague on April 22, 2016.
King Felipe VI of Spain (right) receives Prince Albert II of Monaco at the Zarzuela Palace in Madrid on April 22, 2016.
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Indonesian president Joko Widodo (left) shakes hands with Belgium's King Philippe at the Royal Palace of Brussels on April 21, 2016.
King Mohammed VI of Morocco at the Morocco-GCC (Gulf Cooperation Council) summit in Riyadh, Saudi Arabia on April 20, 2016.