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Richard Coeur de Lion - statue - was created in 1856.
Richard I was also known as Richard the Lionheart and Richard Coeur de Lion.
No, the expression "heart of a lion" is much older than the time of Richard I. Richard was called "Coeur de lion" even before his coronation.
Heart of a lion or Lion Heart
Richard I of England, known as the Lionheart, was one of the leaders of the third crusade.