The Rosetta Stone is significant because it proved to be the key to deciphering Egyptian hieroglyphs, a writing system that had been lost for centuries. Discovered in 1799, the stone features a decree inscribed in three scripts—Greek, Demotic, and hieroglyphic. Scholars, notably Jean-François Champollion, were able to use the Greek text as a comparative tool to unlock the meanings of the hieroglyphics. This breakthrough opened the doors to understanding ancient Egyptian culture, history, and language, fueling further archaeological explorations and studies in Egyptology. The stone remains an essential artifact for appreciating Egypt's rich heritage.