The Rosetta Stone was written in several languages, one of which was Greek. Greek scholars, working back and forth between the Greek and the other languages were able to decipher the contents of the stone.
Thomas Young and Jean-Francois Champollion.
Watson, I have deciphered the clue and now know where the evil lord maladie is hiding!
20 years
Rosette is not a common name for a cut diamond: no raw stone will look like a rosette. Rosette may be a style of setting, where the diamond, usually a small, round stone, is set in a carved rose. 'Rosette diamond' or 'rosetta diamond' may be a brand name, although it is not easily available as a search result.
Scientists and artists, who identified and deciphered the pyramids and other relics of Ancient Egypt. Also the stone of Rosetta was discovered with which the hieroglyphics were finally deciphered.
Champollion
A French scholar, Jean- Francois Champollion, deciphered some of the letters.
French army in the Nile Delta by a town named El- Rashid ( rosette.)
Jean-François Champollion did not discover the Rosetta Stone; it was found in 1799 by French soldiers during Napoleon's campaign in Egypt. Champollion, born on December 23, 1790, eventually deciphered the stone's inscriptions in 1822. Therefore, he was about 31 years old when he accomplished this significant linguistic breakthrough.
Jean-pierre Champollion
Egyptian symbols were being deciphered by many people by studying the Rosetta Stone. Thomas Young and other scholars worked to decipher the symbols. Jean Francois Champollion is credited as the first person to read Egyptian symbols by studying the works of Young and the Rosetta Stone.
After the Rosetta Stone was deciphered in 1822, scholars where able to read Hieroglyphics.