Fascinating! One of the most interesting books I have read was ‘Pillars of the Earth’ by Ken Follet. (I know, fiction. But riveting historical fiction). Those ancient cathedrals are marvels.
Pillars of the earth, I just watched the 8 part series last week it was very good. Free on tubitv.
https://tubitv.com/search/The%20Pillars%20of%20the%20Earth
Hey I posted the wrong link, this is the link I used to watch Pillars of the Earth. https://www.dailymotion.com/video/x6nr74y