Thomas Bruce was the seventh Earl of Elgin. He was the British ambassador to the Ottoman Empire between 1799 and 1803. Traveled to Greece. Wanted everything from the Parthenon, sooo he did. About half of the sculptures that were still in the Parthenon were taken by Bruce and his aides. In 1816, 247 feet of the original 524-foot-long frieze, plus multiple architectural pieces and sculptures, were given to the British Museum. They’re still there today.
I know what you’re thinking: “Does Wikipedia use the term ‘yoink’ to describe Bruce’s acquisition?” The answer is a sad, unfortunate no.