Prehistory . Isis and Horus.
The basis of the Madonna and Child ?
Interesting iconographical aspects:
Left breast of Isis
Horus is seated
Mother "offers" her breast

Isis nursing Horus (the pharaoh) in literally thousands of extant statues, steles, and drawings: sitting for the infant, as is the most common, or standing for the rarer boy or adult male.
In the traditional form Isis sits on a plain throne that is her namesake with her left hand on the infant Horus' back for support, proffering her left breast to the child. Horus is not usually placed on or at Isis' nipple or breast but is generally a little distant, offering the viewer the focus on Isis's breast more than on Horus nursing at the breast. In many of the images of Isis and Horus found in the official tombs and monuments dedicated to the deceased pharaoh, Horus symbolically represents the dead king himself who nurses at the breast of Isis in order to gain the afterlife.