Mysterious Golden Mask

In 1876, a controversial archaeologist and conman named Heinrich Schliemann wanted to uncover the true location of the legendary city of Troy and began the excavation of Mycenae, an archaeological site in Greece. Here he believed he would uncover the graves of the great Mycenaean kings. He found six graves containing 19 bodies all of whom were surrounded by treasures: medallions, goblets, ivory-pommeled swords, rings, and the so-called “Cup of Nester.” In the 5th grave, he found a golden mask, which he instantly claimed was the mask of the legendary king Agamemnon. His findings were quickly dismissed as fake and forgery. Modern research though revealed the mask to be authentic and predating Trojan War by 300-400 years and some estimates put it at approximately 2500 B.C. So, for whom was this incredible mask made?