It is on very rare occasion which you will see various royal families and Crown Heads and generations (who are related) all together in one room. Well that seem to have been the occasion this weekend on Saturday when royals from  Belgium, Netherlands, Liechtenstein, the Nassau household, Luxembourg, Spain, Greece and Denmark,  came together to celebrate Luxembourg former Grand Duke Jean 95th birthday concert who's birthday was on Tuesday.

On the occasion of the official celebration of the 95th anniversary of H.R.H Grand Duke Jean, a concert was given at the Luxembourg Philharmonic.

The concert program was punctuated by glowing tribute delivered by HRH Hereditary Grand Duke Prince Guillaume, SAIR Archduchess Marie-Christine of Austria, H.S.H Princess Maria Annunciata of Liechtenstein and T.R.H Nassau Prince Constantine and Prince Paul Louis of Nassau, grandchildren of HRH Grand Duke Jean.

Guest List included with relation to the Grand Duke:

Grand Duke Henri(son)
Grand Duchess Maria Teresa(daughter in law)
Hereditary Grand Duke Guillaume(grand son)
Hereditary Grand Duchess Stéphanie(wife to grand son, grand daughter in law)
Prince Félix(grand son)
Princess Claire(wife to grand son, grand daughter in law)
Prince Louis(grand son)
Princess Tessy (wife to grand son, grand daughter in law)
Prince Gabriel de Nassau (great grand son, son to Prince Louis and Princess Tessy)
Prince Noah de Nassau(great grand son, son to Prince Louis and Princess Tessy)
Princess Alexandra(grand daughter, daughter to Grand Duke and Grand Duchess)
Prince Sébastien(grand son)

Archduke Carl-Christian of Austria (son in law, married to Archduchess Marie-Astrid
Archduchess Marie-Astrid of Austria (daughter)
Archduchess Marie-Christine of Austria (grand daughter, daughter Archduchess Marie-Astrid)
Count Rodolphe de Limburg-Stirum (husband to Archduchess Marie-Christine, grand son in law
Archduke Imre of Austria (grand son)
Archduchess Kathleen of Austria wife to ArchDuke Imre, grand daughter in law)
Archduke Christoph of Austria(grand son)
Archduchess Adélaïde of Austria(wife to Archduke Christoph, grand daughter in law)
Archduke Alexander of Austria(grand son, son to Archess Marie-Astrid)
Archduchess Gabriella  of Austria (grand daughter, daughter Archduchess Marie-Astrid)

Prince Nikolaus of Liechtenstein(son in law, married to Princess Margaretha of Liechtenstein)
Princess Margaretha of Liechtenstein (daughter)
Princess Maria-Anunciata of Liechtenstein 
Princess Marie-Astrid of Liechtenstein
Prince Josef of Liechtenstein

Prince Jean (
Countess Diane de Nassau
Princess Marie-Gabrielle de Nassau
Prince Carl de Nassau
Prince Constantin de Nassau
Prince Wenceslas de Nassau

Prince Guillaume
Princess Sibilla
Prince Paul-Louis de Nassau
Princess Charlotte de Nassau
Prince Léopold de Nassau
Prince Jean de Nassau

Princess Anne de Ligne
Chevalier Charles de Fabribeckers de Cortils et Grâce

Countess Antonia de Holstein-Ledreborg

Dr Jean H. Fruchaud
Princess Tatiana Radziwill

Archiduchess Anna-Gabriella of Austria

Archduchess Catharina of Austria

Prince El Hassan of Jordan
Princess Sarvath of Jordan

King Konstantine of Greece
Queen Anne-Marie of Greece

Queen Sofia of Spain

Princess Irene of Greece

Princess Beatrix of the Netherlands

King Philippe of the Belgians
Queen Mathilde of the Belgians

Princess Sophie of Hohenberg
Baron Jean-Louis de Potesta

Archduke Karl Peter of Austria
Archduchess Alexandra of Austria

Archduke István of Austria
Archduchess Paola of Austria

Count Andrea Czarnocki-Lucheschi
Archduchess Isabella of Austria-Este