Based on The Riddle of the Rosetta Stone, what role did Sylvestre de Sacy play in Jean-François Champollion’s career? De Sacy gave Champollion a job, which allowed him to earn a living while continuing to decipher the writings on the Rosetta Stone. De Sacy taught Champollion everything he knew, which allowed him to decipher the writings on the Rosetta Stone. Champollion was inspired by de Sacy, who had already successfully deciphered the writings on the Rosetta Stone. Champollion studied with de Sacy, who had already attempted to decipher the writings on the Rosetta Stone.