It appears the ancient world had unreasonably accurate knowledge of the size of the earth and its shape: Analysis of ancient monuments reveals an exact estimate for the circumference of the mean Earth, a spherical version of the Earth, un-deformed by it spinning once a day. Half of this circumference, the north-south meridian, was known to be about 12960 miles (5000 geographical Greek feet of 1.01376 ft), a number which (in those Greek units) is then 60^5 = 777,600,000 geographical Greek inches. One has to ask, how such numbers are to be found very accurately within a planet formed accidentally during the early solar system?
John Michell’s booklet on Jerusalem found (in its Addendum) that the walls of the Temple Mount, extended for the rebuilding of the Temple of Solomon, was a scaled down model of the mean-earth Meridian in its length. These walls are still 5068.8 feet long, which is the length of a Greek geographical mile. This unit of measure divides the meridian into 12960 parts, each a geographical Greek mile.
This in preparation for a post on the significance of St Mary’s Chapel in early Christianity and in particular the small round wattle-and-daub building with an intricate pavement, contemporaneous with the Westminster Abbey sanctuary pavement but of a design and a date unknown. Important but often speculative twentieth Century sources are Bligh Bond, John Michell and Keith Critchlow, whilst the earliest historian to record its history was William of Malmesbury.
William’s history of Glastonbury was significantly changed in the century after it was written, to suit the Abbey’s pilgrimage business. Fortunately, the main body of that history lived on unaltered in William’s revision of his History of the Kings of England. The notes below were made using The Glastonbury Legends pages 26-41, by Professor (of History) R.F. Treharne (1901 – 1967), Aberystwyth University.
William of Malmesbury wrote a large-scale history of England (Kings of England) by 1125. In it he stated that Glastonbury Abbey had been founded , on the advice of St. Aldhelm, by Ine, King of Wessex (688-726), a statement which he repeated in his Ecclesiastical History also finished in 1125. Later, when writing a Life of St. Dunstan (undated) he realised Glastonbury was much older than that since “Glastonbury had already passed under ecclesiastical authority long before the time of St Patrick, who had died in A.D. 472”. So, impressed by what he had seen and heard at Glastonbury, he wrote a separate monograph on the antiquity of that great abbey, completed by 1135.
In 1972 John Michell inferred an enormous ten-sided form nearly sixty three miles across, in which important historical and neolithic sites had been intended as ten vertices around an ancient centre, signified by a Whiteleafed Oak.
Michell had previously  developed the idea of the enchantment of the land as an actual practice; land areas were enchanted by using a geometrical pattern integrated with myths and ritual calendars, enacted within that framework. This was long before, around 930, such a pattern was being established of thing-places in Iceland. The idea of thing places is still find-able in English names such as Goring, the centre northeast of Stonehenge, where the summer solstice sun arose.
“Perpetual choirs were a Celtic institution, from pagan into early Christian times. In Iola Morganwg’s Triads of Britain, translated from Welsh, it is stated that ‘in each of these three choirs there were 24,000 saints; that is, there were a hundred for every hour of the day and the night in rotation, perpetuating the praise and service of God without rest or intermission.’ ” – The Measure of Albion
“Three of the choirs were located at Stonehenge, at Glastonbury, and near Llantwit Major in Wales. Others appear to have been at Goring-on- Thames and at Croft Hill in Leicestershire, a traditional site of ritual, legal, and popular assemblies.” The Dimensions of Paradise