Bomb, Genoa Cathedral, Genoa, Liguria, Italy, Europe

Genoa harbour was bombarded on 9 February, with the force sinking four cargo ships and damaging 18. A salvo from HMS Malaya landed between 200 to 50 yards short of the Italian battleship Caio Duilio, undergoing repairs in dry dock north of Molo Ciano; no damage was reported. A targeting error by a gunnery officer on board HMS Malaya led to an armour piercing round hitting Genoa Cathedral, the shell failed to explode and remains on display there.
http://military.wikia.com/wiki/Operation_Grog