How long was the rule of the dynasty that was active when the Rosetta Stone was inscribed?
Rosetta Stone The Rosetta Stone is a granodiorite stele, found in 1799, inscribed with three versions of a decree issued at Memphis, Egypt in 196 BC during the Ptolemaic dynasty on behalf of King Ptolemy V. The top and middle texts are in Ancient Egyptian using hieroglyphic script and Demotic script, respectively, while the bottom is in Ancient Greek. As the decree has only minor differences between the three versions, the Rosetta Stone proved to be the key to deciphering Egyptian hieroglyphs.
Lakhmids The Lakhmids (Arabic: اللخميون‎ ‎ ) or Banu Lakhm (بنو لخم ) were an Arab kingdom of southern Iraq with al-Hirah as their capital, from about 300 to 602 AD. They were generally but intermittently the allies and clients of the Sassanian Empire, and participant in the Roman–Persian wars.