I would think to destroy the engineering you would have to kill all of the engineers. Some things are handed down through the work. The muslims destroyed the library at alexandria supposedly the largest compository of documents and books in the world at that time.
The vatican has a lot of roman and church stuff all the way back to 2nd century AD
“...I would think to destroy the engineering you would have to kill all of the engineers....”
True enough. Knowledge can be passed down to apprentices and taught hands-on.
Interesting that we have our OWN modern-day barbarians to deal with (libs and their antifa buddies) who want to tear things down.
Some things never change.