Sources:
- https://nl.wikipedia.org/wiki/Castellum_(Maastricht)
- https://vici.org/vici/20074/?lang=en
- https://inloggen.learnbeat.nl/activities/show/29117976/2058295
Pictures and video:
- https://www.youtube.com/watch?v=CroZk3NTXak
- I found most of the pictures by searching them on google