This famous ancient building is known as...

The Treasury of Atreus or Tomb of Agamemnon is a large "tholos" tomb on the Panagitsa Hill at Mycenae, Greece, constructed during the Bronze Age around 1250 BC. The lintel stone above the doorway weighs 120 tons, with approximate dimensions 8.3 x 5.2 x 1.2m. The tomb has probably no relationship with either Atreus or Agamemnon, as archaeologists believe that the sovereign buried there ruled at an earlier date than the two.