Her Britannic Majesty, The Queen Elizabeth II of Windsor decided to celebrate the idea of "the devine right of Kingship" for her Jubilee year by hosting a Luncheon for Soverigns of the World at Windsor Castle.
Didnt quite go down to well, mostly because the Monarchies are now subject to their Governments. For example, An invitation was sent to the Spainish Queen who couldnt attend because her bankrupt Government told her not to because they are pissed off at the British Government for protecting Gibralter whilst the rest of spain slides into financial meltdown

The king of The Swaziland in Africa turned up, to be met with hostility because he still lives like Kings of bygone ages whilst his countrymen starve to death in famine. The King of Bahrain also turned up and people were unfriendly to him because his Government tried to quash the democratic rebellions they've suffered recently
Those invited include
Here is a full guest list of foreign royals attending the lunch for sovereign monarchs:
HM The King of
Bahrain and HRH Princess Sabeeka bint Ibrahim Al Khalifa,
HM The King of The
Belgians and HM The Queen of The Belgians,
HM The Sultan and Yang Di-Pertuan of
Brunei and HM Raja Isteri Pengiran Anak Hajah Saleha,
HM King Simeon II of the
Bulgarians and HM Queen Margarita of the Bulgarians,
HM Queen Margrethe II of
Denmark and HRH The Prince Consort (Denmark),
HM King Constantine of the Hellenes and HM Queen Anne-Marie of the Hellenes,
(Greeks)
HM The Emperor of Japan and HM The Empress of
Japan,
HM The King of the Hashemite Kingdom of
Jordan and HM Queen of the Hashemite Kingdom of Jordan,
HH Sheikh Nasser Mohamed Al-Jaber Al-Sabah of
Kuwait,
HM King Letsie III of
Lesotho and HM Queen Masenate Mohato Seeiso of Lesotho,
HSH Prince Hans-Adam II of
Liechtenstein,
HRH The Grand Duke of
Luxembourg and HRH The Grand Duchess of Luxembourg,
HM Seri Paduka Baginda Yang di-Pertuan Agong of
Malaysia and HM Seri Paduka Baginda, Raja Permaisuri of Malaysia,
HSH The Prince of
Monaco and HSH The Princess of Monaco
HRH Princess Lalla Meryem of
Morocco,
HM The Queen of the
Netherlands,
HM The King of
Norway and HM The Queen of Norway,
HH The Emir of The State of
Qatar and HH Sheika Mozah bint Nasser Al-Missned,
HM King Michael I of
Romania and HM Queen Anne of Romania,
HRH Prince Mohammed Bin Nawaf Bin Abdulaziz Al Saud of
Saudi Arabia,
HM King Mswati III of
Swaziland and Inkhosikati LaMbikiza,
HM The King of
Sweden and HM The Queen of Sweden,
HRH The Crown Prince of
Thailand and HRH Princess Srirasm of Thailand,
HM The King of Tonga and HM The Queen of
Tonga,
HH The Crown Prince of
Abu Dhabi,
HRH The Crown Prince of Yugoslavia and HRH The Crown Princess of
Yugoslavia. (Whose Country no longer even exists!)
Spain refused to attend