What century did Shulgi reign for 48 years?
Shulgi Shulgi ( Šulgi, formerly read as Dungi) of Ur was the second king of the "Sumerian Renaissance" in the Third Dynasty of Ur. He reigned for 48 years, from c. 2029 – 1982 BC (short chronology). His accomplishments include the completion of construction of the Great Ziggurat of Ur, begun by his father Ur-Nammu.
Shamshi-Adad II Shamshi-Adad II or Šamši-Adad II, inscribed "Šam-ši-"IM, was an Old Assyrian king who ruled in the mid-second millennium, ca. 1585-1580 BC (short chronology). His reign falls within the "dark age" period of Assyrian history where written records are scarce.