Enki and later Ea were apparently depicted, sometimes, as a man covered with the skin of a fish, and this representation, as likewise the name of his temple E-apsu, "house of the watery deep", points decidedly to his original character as a god of the waters (see Oannes). Around the excavation of the 18 shrines found on the spot, thousands of carp bones were found, consumed possibly in feasts to the god. Of his cult at Eridu, which goes back to the oldest period of Mesopotamian history, nothing definite is known except that his temple was also associated with Ninhursag's temple which was called "Esaggila", "the lofty head house" ("E", house, "sag", head, "ila", high; or Akkadian goddess = Ila), a name shared with Marduk's temple in Babylon, pointing to a staged tower or ziggurat (as with the temple of Enlil at Nippur, which was known as "E-kur" ("kur", hill)), and that incantations, involving ceremonial rites in which water as a sacred element played a prominent part, formed a feature of his worship. This seems also implicated in the epic of the hieros gamos or sacred marriage of Enki and Ninhursag (above), which seems an etiological myth of the fertilisation of the dry ground by the coming of irrigation water (from Sumerian "a", "ab", water or semen). The early inscriptions of Urukagina in fact go so far as to suggest that the divine pair, Enki and Ninki, were the progenitors of seven pairs of gods, including Enki as god of Eridu, Enlil of Nippur, and Su'en (or Sin) of Ur, and were themselves the children of An (sky, heaven) and Ki (earth). The pool of the Abzu at the front of his temple was adopted also at the temple to Nanna (Akkadian Sin) the Moon, at Ur, and spread from there throughout the Middle East. It is believed to remain today as the sacred pool at Mosques, or as the holy water font in Catholic or Eastern Orthodox churches.