During the 1970s, further archaeological excavations in Caria revealed Mycenean buildings at Iasus (with two "Minoan" levels underneath them), as well as Protogeometric and Geometric material remains (i.e. cemeteries and pottery). Archaeologists also confirmed the presence of Carians in Sardis, Rhodes, and in Egypt where they served as mercenaries of the Pharaoh. In Rhodes, specifically, a type of Carian chamber-tomb known as a "Ptolemaion" may be attributed to a period of Carian hegemony on the island. Despite this period of increased archaeological activity, the Carians still appear not to have been an autochthonous group of Anatolia since both the coastal and interior regions of Caria were virtually unoccupied throughout prehistoric times.