i think he won back his greek citizinship?
The personal possessions were returned to him about 12 years ago, in the early 1990s, when then Prime Minister Karamanlis allowed Constantine to pack up all his possessions, mostly in Tatoi and Mon Repos, and ship them to the U.K.
The King may only gain back his greek citizenship if he registers with a local Greek registry office and takes on a surname.
His family currently holds a Danish passport, and he is known as Constantine de Grecia on it. He may return and travel to Greece whenever he likes, as Greece is part of the Schengen Treaty, which allows free passage to any EU member state.
They took away his citizenship based upon an obscure reading of the monarchy constitution, which the Socialist government claimed gave the members of the royal family only priviliged status as Greek citizens, but not actual citizenship.