How long was the rule of the dynasty that was active when the Rosetta Stone was inscribed?
Ptolemaic dynasty The Ptolemaic dynasty (Ancient Greek: Πτολεμαῖοι , "Ptolemaioi"), sometimes also known as the Lagids or Lagidae (Ancient Greek: Λαγίδαι , "Lagidai", after Lagus, Ptolemy I's father), was a Macedonian Greek royal family, which ruled the Ptolemaic Kingdom in Egypt during the Hellenistic period. Their rule lasted for 275 years, from 305 to 30 BC. They were the last dynasty of ancient Egypt.
Sewadjkare Hori Sewadjkare Hori (also known as Hori II) was a pharaoh of the late 13th dynasty, possibly the thirty-sixth king of this dynasty. He reigned over Middle and Upper Egypt for 5 years either during the early or mid-17th century, from 1669 until 1664 BC or from 1648 until 1643 BC.