I'm glad you enjoyed the video Dianne. I imagine we've both seen plenty of flats like those in our time! Hope your son finds his feet in Sheffield.
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Here's an article that reports on the recent publication of a seven-vol book about African architecture:-
https://www.bbc.com/news/world-africa-58855205
They've chosen 12 photos/12 buildings. As the oldest building is from 3 000 B.C., their choices represent a certain amount of narrowing down from five thousand years of construction.