This slab that's inscribed in 3 different languages was found by the French in 1799
In 
September 1799 this discovery was made public in an article printed in the 
Courrier de ... During the Ptolemic dynasty, Egyptian and Greek languages were 
used until the... [DOC] [TLE] Champollion Deciphered Rosetta Stone - Schiller Institute [PAR] As the French philologist wrote, at the conclusion of his major work, the ... the 
basalt slab was inscribed with texts in three scripts: hieroglyphics at the ...