Eanna

E-anna (, house of heavens), also referred to as the Temple of Inanna, was an ancient Sumerian temple in Uruk. Considered the "residence" of Inanna, it is mentioned throughout the Epic of Gilgamesh and various other texts. The evolution of the gods to whom the temple was dedicated is the subject of scholarly study.

The Epic of Gilgamesh
From Tablet One:

He carved on a stone stela all of his toils, and built the wall of Uruk-Haven, the wall of the sacred Eanna Temple, the holy sanctuary.