Shamshi-Adad I
The length of Naram-Sin's reign is uncertain, however; based on various excavated "limmu" (eponym) lists, the reigns of Naram-Sin and his son and successor Erishum II had a combined length of 64 years. The Assyrian King List records that Shamshi-Adad I, “went away to Babylonia in the time of Naram-Sin.” Shamshi-Adad I did not return until he had taken Ekallatum, after which he paused for three years and then overthrew Erishum II. The Mari Eponym Chronicle, which resumes the listing until the seizure of Ekallatum by Shamshi-Adad I, provides no clue as to when the succession of Erishum II had taken place. As the reign of Erishum II was prematurely ended by the conquests of Shamshi-Adad I, it is likely that Naram-Sin's reign was the greater part of the period, additionally; the broken figure on the Nassouhi King List ends on four, so perhaps Naram-Sin reigned 44 or 54 years (c. 1872 BC onward, middle chronology). Despite this, there are no extant monumental inscriptions recording his activities.