Treasury of Atreus (c. 1250 BC): The Great Tholos Tomb of Mycenae

The Treasury of Atreus is a monumental tholos, or beehive-shaped tomb, built at Mycenae in southern Greece around 1300-1250 BC. With a stone dome about 14.5 metres across, it is the largest and best-preserved Mycenaean tomb and one of the great engineering achievements of Bronze Age Europe. Despite its name, it held no treasure when explored in modern times and has no proven link to the legendary king Atreus.

Background: tholos tombs at Mycenae

Mycenaean rulers at first buried their dead in shaft graves, such as those of Grave Circle A. From about 1500 BC the elite began to build tholos tombs: circular stone chambers roofed with a pointed dome and set into a hillside, reached by a long open passage.

Nine tholos tombs are known around Mycenae. They became larger and more refined over time, and the Treasury of Atreus, together with the so-called Tomb of Clytemnestra, belongs to the last and grandest group. Its scale suggests it was built for a king or a ruling family at the height of Mycenae’s power.

How the tomb was built

The builders first cut the passage, called the dromos, into the hill. It is about 36 metres long and 6 metres wide, lined with walls of carefully cut blocks of conglomerate stone. At its end is a doorway about 5.4 metres high, narrowing slightly towards the top.

Above the door lie two huge lintel stones. The inner one is about 8 metres long and is commonly estimated to weigh around 120 tonnes, making it one of the heaviest stones ever placed in a Greek building. Above the lintel the builders left a triangular gap, the relieving triangle, to divert the weight of the masonry away from the lintel.

The chamber is roughly 14.5 metres in diameter and about 13.2 metres high. It was built by corbelling: each ring of stone was laid slightly further inward than the one below, until the rings closed at the top under a single capstone. The stones were then trimmed to give a smooth curved surface, and the whole structure was covered with an earth mound. The interior may once have been decorated with bronze rosettes, as nail holes in the stones suggest.

A doorway in the side of the main chamber leads to a smaller, roughly square room cut into the rock. It was probably the burial chamber or a place for earlier remains and offerings.

The decorated facade

The entrance was once framed by half-columns of green stone carved with zigzags and spirals, and the relieving triangle was closed with slabs of red and green stone. These pieces fell or were removed long ago. In the early 19th century fragments were taken away, and several are now in the British Museum in London, while others are in Athens.

Engineering and comparisons

A corbelled dome is not a true dome. Its stones do not lean against one another like the wedge-shaped blocks of a Roman arch; each ring simply overhangs the one below and is held in place by the weight of stone and earth pressing on its outer end. This is why the earth mound was essential, and why tholos tombs that lost their covering often collapsed.

The width of the chamber was not exceeded by any dome until Roman engineers, using concrete, built structures such as the Pantheon in Rome in the 2nd century AD. Other famous tholoi, including the Treasury of Minyas at Orchomenos in Boeotia, follow a similar plan but survive less well. Moving and lifting the lintel probably required earth ramps, levers, rollers and hundreds of workers, which shows the labour a Mycenaean ruler could command.

Why is it named after Atreus?

In Greek legend Atreus was a king of Mycenae and the father of Agamemnon and Menelaus. When Pausanias visited Mycenae in the 2nd century AD, he was shown underground buildings said to be the treasuries of Atreus and his sons. Early modern travellers attached the name to this tomb, and it has also been called the Tomb of Agamemnon.

Both names are conventions. The tomb had been robbed in antiquity, no body or inscription was found, and the stories of Atreus belong to myth. Excavations by the British archaeologist Alan Wace in the 1920s and 1930s, including pottery found beneath the threshold, placed the construction in the 13th century BC, though some scholars prefer an earlier date.

Timeline

• c. 1500 BC: The first tholos tombs are built at Mycenae.
• c. 1300-1250 BC: The Treasury of Atreus is constructed.
• c. 1200 BC: Mycenae’s palace is destroyed; the tomb is later robbed.
• 2nd century AD: Pausanias describes treasuries of Atreus and his sons at Mycenae.
• Early 19th century: Fragments of the decorated facade are removed; some reach the British Museum.
• 1920s-1930s: Alan Wace’s excavations refine the date of the tomb.
• 1999: The tomb becomes part of the UNESCO World Heritage Site of Mycenae and Tiryns.

Why it matters

The Treasury of Atreus shows how far Mycenaean builders could push stone construction without mortar or the true arch. Its dome was not surpassed in width until Roman times, and it remains the most impressive surviving monument to the kings of Bronze Age Mycenae.