Who said that history repeats itself?

You're probably thinking of the famous quote by the great Spanish philosopher George Santayana (1863-1952), who said in The Life of Reason (5 volumes, 1905-6): "Those who cannot remember the past are condemned to repeat it."
Another quote comes from German philosopher Karl Marx (1818-1883), who said in The Eighteenth Brumaire of Louis Bonaparte(1852):"Hegel remarks somewhere that history tends to repeat itself. He forgot to add: the first time as tragedy, the second time as farce."