"The Greeks didn't know those marble pieces existed until they were dug out of the ground by the Brits."
Incorrect. The Parthenon wasn't underground. Elgin bribed Turkish officials who were in possession of the Parthenon at the time to allow him to loot it. It was rather disgraceful.
That was still long after the Venetians had knocked all the marbles off the building.
BTW, the Turks OWNED the place for a long time and the Greeks didn't do anything about it. Then, the Brits got the marbles and saved them from further Turkish depredation.
Then the Greeks had their revolution.
Did you know the Greeks used to purchase tin from the Phoenicians who'd stolen it from the Britons?
's a fact!