I had a tour around this cathedral a few months ago which was really interesting. The cathedral is built very similar to a castle. There are window slits for ar

I had a tour around this cathedral a few months ago which was really interesting. The cathedral is built very similar to a castle. There are window slits for archers to defend, murder holes at the doors and also two big quarters for soldiers. I think the guide said at one point two hundred soldiers lived there (along with the clergy) in medieval times.