When archaeologist Leonard Woolley excavated the ruins of the museum, its contents were discovered to be labeled, using tablets and clay drums.[10] Many of the artifacts had been originally excavated by Nabonidus, Ennigald's father, and were from the 20th century BCE. Some artifacts had been collected previously by Nebuchadnezzar.[2] Some are thought to have been excavated by Ennigald herself. The items were many centuries old already in Ennigald's time and came from the southern regions of Mesopotamia.[3]