(Shared by Andrew Agerbak)
Dear fellow British Museum tour guides, I saw this today and thought it added some additional richness to my favourite part of the museum: the Lachish Room.
Original research paper (paywall): https://onlinelibrary.wiley.com/doi/epdf/10.1111/ojoa.12231
"According to the study, the siege ramp was roughly 260 feet long and would have required almost 20,000 tons of stones. Working 24 hours a day, it would have taken the Assyrian army between 20 and 25 days to construct the ramp."
Further articles on Lachish: https://www.biblicalarchaeology.org/daily/biblical-sites-places/biblical-archaeology-sites/lachish/