Gunnar Heinsohn via Q-mag, just released a 104p pdf on the archaeology of Jerusalem over the first millennium. It argues how, like the rest or Europe,  it only seems to have about 300 years of of evidence spread out; padded, to fit 1000 years. 

Huge British hillside chalk figure finally dated - scientists quite surprised

'National Trust archaeologists surprised by likely age of Cerne Abbas Giant'

“Many archaeologists and historians thought he was prehistoric or post-medieval, but not medieval. Everyone was wrong ... Material taken from the deepest layer (1m) yielded a date range of 700-1100AD.”

• Why did no one guess in those four centuries?
• which direction in the sky does that hillside face?
• short backgrounder on the mystery of why it was made

from Heinsohn, a quote circa 936 CE

Gunnar Heinsohn recently speculated 'Did Comet Heinrich-Swift-Tuttle terminate Roman and global civilization?'

It is short. In it he someone alive then about the years just before 936 CE

“In the same year frightening omens were seen, namely comets, which were visible from October 17 to November 1. This phenomenon made many people tremble, because they feared a furious plague or at least an overthrow of the regime. At the least, many disturbing signs appeared before Heinrich's passing [936 AD] . The sun was without light, although the skies were clear and cloudless, but it looked blood-red through the windows. Also, it was said, the mountain in which the mighty king was buried spat fire in several places. / The comet was followed by a flood and the latter by a pestilence of cattle...”