[luma]

> The cannonball crashed into the church and went through a first wall. It then ended on the altar of the Chapel of the Virgin. [...] The cannon ball was walled into the left wall of the Chapel and a commemorative epigraph was added to it.

It wasn't showing the wall where it had crashed through, it's showing where the ball has been mounted into the wall for display.

[kevin_thibedeau]

The Aurelian wall looks like a ball was grouted in as well.