Jean – Francoise Champollion was made famous by breaking the code that unlocked the mean of the ancient Egyptian hieroglyphics.
Egyptian hieroglypics were deciphered by Champollion in 2822, over 20 years after the Rosetta Stone was discovered.
The phrase “Your building is as durable as the sky” was deciphered by Champollion from the hieroglyphics on the Rosetta Stone.