The emir of Qatar, Sheikh Tamim bin Hamad Al Thani (left), meets Turkish president Recep Tayyip Erdogan in Istanbul, Turkey on September 25, 2015.
Prince, sultan, and emir speak at UN summit
Prince Albert II of Monaco speaks the United Nations Sustainable Development Summit in New York September 26, 2015.
Belgian royals promote art exhibitions
Belgium's Queen Mathilde poses during the inauguration of the exhibition @yourservice, organized by the Belgian Ministry of Foreign Affairs, in Brussels on July 17, 2015.
Dutch king welcomes the president of Tanzania
King Willem-Alexander of the Netherlands (right) receives the president of Tanzania, Jakaya Kikwete, at the Noordeinde Palace in The Hague on June 8, 2015. (AFP PHOTO / ANP / LEX VAN LIESHOUT)
Prince Albert at Star Team for Children event
Prince Albert of Monaco poses beside a llama during a Star Team for Children charity event on March 28, 2015 in Sexten, Italy. Here's a video about the event, including comments made by Prince Albert in English. (Photo below by Jan Hetfleisch/Getty Images)
Dutch king visits Rembrandt exhibition
King Willem Alexander of the Netherlands visits the "Late Rembrandt" exhibition on February 12, 2015 at the Rijksmuseum in Amsterdam. (Photo by Robin Utrecht/Getty Images)
Beatrice and Fergie attend charity dinner
Britain's Princess Beatrice and her mother, Sarah, Duchess of York, attend Bell Pottinger's charity dinner for Northwood African Education Foundation at Lancaster House in London on November 4, 2014. (Photo by David M. Benett/Getty Images for Bell Pottinger)
Dutch royals welcome the president of China
Below: Chinese President Xi Jinping and his wife, Peng Liyuan, with Dutch royals King Willem-Alexander, Queen Maxima, and Princess Beatrix at the Royal Palace in Amsterdam on March 22, 2014. Xi Jinping is on a two-day state visit to the Netherlands. (Photo by Michel Porro/Getty Images)