King Mohammed VI of Morocco at the Morocco-GCC (Gulf Cooperation Council) summit in Riyadh, Saudi Arabia on April 20, 2016.
Monarchs attend Islamic Cooperation summit in Turkey
The sultan of Brunei, Hassanal Bolkiah, attends the 13th Organization of Islamic Cooperation summit on April 14, 2016 in Istanbul, Turkey.
Prince Charles receives the rulers of Kuwait and Jordan
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Rulers attend Gulf Cooperation Council summit in Saudi Arabia
King Salman of Saudi Arabia (left) looks on as Sheikh Mohammed bin Rashid Al Maktoum (right), who is ruler of Dubai and also prime minister and vice president of the United Arab Emirates, is greeted by Saudi officials in Riyadh on December 9, 2015.
The emir of Kuwait visits Russia
The emir of Kuwait, Sheikh Sabah Al-Ahmad Al-Jaber Al-Sabah (left) meets Russian president Vladimir Putin at the Bocharov Ruchey state residence in Sochi, Russia on November 10, 2015. Sheikh Sabah is on a three-day state visit to Russia.
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.
Emirs of Kuwait, Qatar attend Gulf summit in Washington DC
United States president Barack Obama (left) welcomes the emir of Kuwait, Sheikh Sabah Al-Ahmad Al-Jaber Al-Sabah (right), to the White House in Washington, DC, on May 13, 2015. President Obama is hosting Gulf Cooperation Council leaders to discuss regional security issues.
Royals attend GCC summit
King Salman bin Abdulaziz of Saudi Arabia (right) meets with Sheikh Mohammed Bin Rashid al-Maktoum, ruler of Dubai, during the Gulf Cooperation Council summit in Riyadh on May 5, 2015. (Photos by FAYEZ NURELDINE/AFP/Getty Images)
Emir of Kuwait welcomes the president of Turkey
Turkish president Recep Tayyip Erdogan (left) meets with the emir of Kuwait, Sheikh Sabah al-Sabah (right), in Kuwait City on April 28. (Photo by Turkish Presidency / Yasin Bulbul/Anadolu Agency/Getty Images)
Monarchs attend Arab League summit
Saudi Arabia's King Salman attends the Arab League summit in Egypt's Red Sea resort of Sharm El-Sheikh on March 28, 2015. (Photo by STR/AFP/Getty Images)