He revived a priesthood last held 1,700 years earlier
Around 550 BCE, the Babylonian king Nabonidus installed his own daughter as high priestess of the moon god at Ur, reviving an ancient office that had long fallen into disuse — one whose most famous early holder, Enheduanna, had served some 1,700 years earlier. To reconstruct the lapsed rites, his scribes consulted monuments left by far older ages.
How we know
Enheduanna served as en/entu-priestess of the moon god Nanna at Ur c. 2285 BCE (reign of Sargon of Akkad); Nabonidus (r. 556–539 BCE) revived the entu office of Sin at Ur and installed his daughter Ennigaldi-Nanna, dated c. 547 BCE (vacant since Nebuchadnezzar I, 12th c. BCE). Gap ~1,735 years (~1,700). Middle Chronology.
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