What happens when, as in the case of Asia Minor now the parastate of Turkey, the invaders - the Turks - take over and commit human and cultural genocide destroying every vestige of Hellenism as they did in Asia Minor...the surviving Greeks who example escaped to the motherland Greece —but the relics and artifacts etc of a 5000 year old civilization remain in Turkey for the most part abandoned, destroyed, whitewashed, and the few great Christian churches that survived turned into warehouses and mosques.
Hmmm...what happens then? Who gets to claim the treasures——those who created them (Greeks) or those who tried to destroy them (Turks)?
There. Does that clear up the confusion?