rosettastone It was unearthed by a French soldier in July 1799 Inscribed hieroglyphics 'key' Company known for programming languages 1799 discovery that made possible the decipherment of Egyptian hieroglyphics Key discovery of 1799 Important archeological discovery: 1799 Key to deciphering Egyptian hieroglyphics Inscribed slab found 1799, making it possible to decipher Egyptian hieroglyphics