The artifact that revealed crucial information about ancient languages is the Rosetta Stone. Discovered in 1799, this granodiorite stele features inscriptions in three languages: Greek, Demotic, and hieroglyphs. The Greek inscription allowed historians and linguists to decipher the hieroglyphs for the first time, unlocking the language of ancient Egyptian civilization. The Rosetta Stone thus became a key to understanding not only ancient Egyptian writing but also the culture and history of a civilization that spanned millennia. Its discovery marked a significant milestone in the field of Egyptology and linguistics.