https://www.thecolchesterarchaeologist.co.uk/?p=34817
https://penelope.uchicago.edu/~grout/encyclopaedia_romana/britannia/boudica/claudiusarch.html
http://www.i-claudius.com/the-temple-of-claudius-in-camulodunum-colchester-england/
https://www.visitessex.com/things-to-do/roman-wall-guard-room-triumphal-arch-p1269201