Switzerland's and world's oldest surviving architecture plan from Middle Ages goes on public display

[BECKHAM]

The Plan of St Gall, which dates back to approximately 825AD, is now on public display for the first time.

for more... (https://www.thelocal.ch/20190412/switzerlands-and-worlds-oldest-surviving-architecture-plan-from-middle-ages-goes-on-public-display)