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.
Ashur-rabi II Aššur-rabi II, inscribed "aš-šur-""-bi", "(the god) Aššur is great," was king of Assyria 1012–972 BC. Despite his lengthy reign (41 years), one of the longest of the Assyrian monarchs, his tenure seems to have been an unhappy one judging by the scanty and laconic references to his setbacks from later sources.