Greek pyramids, also known as the Pyramids of Argolis, refers to several ancient structures located in the plains of Argolid, Greece. The best known of these is known as the Pyramid of Hellinikon (). In the time of the geographer Pausanias it was considered to be a tomb. Twentieth century researchers have suggested other possible uses. Background In addition to at least two pyramids which no longer exist, there are two surviving pyramid-like structures still available to study, one at Hellenikon and the other at Lygourio, a village near the Ancient Theatre of Epidaurus. At the Southeastern edge of the plain of Argos, near the springs of river Erasinos (spring of Kefalari (Argolis)) and on the main arterial road which in antiquity led from Argos to Tegea and the rest of Arcadia and Kynouria, there is a small structure extant known as the Pyramid of Hellenikon. Although these structures are of great interest, written references are rather scarce and they are not mentioned in ancient sources. Pausanias (2nd century AD) mentions two buildings resembling pyramids, one, southwest of the still standing structure at Hellinikon, a common tomb for soldiers who died in a legendary struggle for the throne of Argos and another which he was told was the tomb of Argives killed in a battle around 669/8 BC. Neither of these still survive. On the way from Argos to Epidauria there is on the right a building made very like a pyramid, and on it in relief are wrought shields of the Argive shape. Here took place a fight for the throne between Proetus and Acrisius; the contest, they say, ended in a draw, and a reconciliation resulted afterwards, as neither could gain a decisive victory. The story is that they and their hosts were armed with shields, which were first used in this battle. For those that fell on either side was built here a common tomb, as they were fellow citizens and kinsmen. Excavations and dating The pyramidal in Hellenikon was excavated first by Theodor Wiegand, who essentially removed all the fill from the floor. Later on in 1937, more excavation was made by the American School of Archaeology at Athens under the direction of L. Lord who concluded that both the structure at Ligurio and the one at Cephalaria were "guard houses capable of accommodating a small garrison who could control the countryside and be safe behind