Design and Construction
Maeshowe is one of the largest tombs in Orkney; the mound encasing the tomb is 115 feet (35 m) in diameter and rises to a height of 24 feet (7.3 m). Surrounding the mound, at a distance of 50 feet (15 m) to 70 feet (21 m) is a ditch up to 45 feet (14 m) wide. The grass mound hides a complex of passages and chambers built of carefully crafted slabs of flagstone weighing up to 30 tons. It is aligned so that the rear wall of its central chamber held up by a bracketed wall, is illuminated on the winter solstice. A similar display occurs in Newgrange.
This entrance passage is 36 feet (11 m) long and leads to the central almost square chamber measuring about 15 feet (4.6 m) on each side. The current height of the chamber is 12.5 feet (3.8 m), this reflects the height to which the original stonework is preserved and capped by a modern corbelled roof. The original roof may have risen to a height of 15 feet (4.6 m) or more. The entrance passage is only about 3 feet (0.91 m) high, requiring visitors to stoop or crawl into the central chamber. That chamber is constructed largely of flat slabs of stone, many of which traverse nearly the entire length of the walls. In each corner lie huge angled buttresses that rise to the vaulting. At a height of about 3 feet (0.91 m), the wall's construction changes from the use of flat to overlapping slabs creating a beehive-shaped vault.
Estimates of the amount of effort required to build Maeshowe vary; a commonly suggested number is 39,000 man-hours, although Colin Renfrew calculated that at least 100,000 hours would be required. Dating of the construction of Maeshowe is difficult but dates derived from burials in similar tombs cluster around 3000 BC. Since Maeshowe is the largest and most sophisticated example of the Maeshowe "type" of tomb, archaeologists have suggested that it is the last of its class, built around 2800 BC. The people who built Maeshowe were users of grooved ware, a distinctive type of pottery that spread throughout the British Isles from about 3000 BC.
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