Who studied egyptianhieroglyphics for many years and cracked the meaning of this ancient picture writting

Many people contributed to the deciphering of the Egyptian Hieroglyphs, but the final and most deciding contribution was done by Jean-Francois Champollion, a French scholar, who was able to compare the Egyptian script to a text in the known Greek one thanks to the discovery of Rosetta Stone, a stone with the same text in three languages: two types of Egyptian and the known Greek one