[SunkenCiv]

The short answer is: earthquakes and popes, in that order.

0:00 Introduction
0:30 Games of the Colosseum
1:43 Decline of the Games
3:15 The medieval Colosseum
5:37 The Colosseum during the Renaissance

What happened to the missing half of the Colosseum? | 7:26
toldinstone | 398K subscribers | 3,885,869 views | February 6, 2021

[MD Expat in PA]

Thanks for that video.

I’ve watched a few documentaries about early medieval England where one can find stones obviously scavenged and repurposed from Brito-Romano era buildings, some with Latin text still on them and used to build churches.

I watched this not long ago. Fascinating.

Colosseum: Roman Death Trap | Full Documentary | NOVA | PBS

https://www.youtube.com/watch?v=lxUuufuUEiU