TIL that in the 1700's there was a plan to build a church into the Colosseum in Rome

https://www.romereports.com/en/2017/04/13/the-history-of-the-church-that-was-never-built-inside-the-colosseum/

https://www.reddit.com/r/todayilearned/comments/15lxhkn/til_that_in_the_1700s_there_was_a_plan_to_build_a/