Gargoyles

Among many other striking things in the old centre of Innsbruck are some fearsome gargoyles on church towers and, as here, on the Stadtturm.

Wikipedia tells me (so it must be true) that the word "gargoyle" derives from "La Gargouille", a dragon from which a Merovingian saint delivered the city of Rouen, following which its head was attached to the church to ward off evil spirits.

Some of these particular dragons look as though they could scare off just about anything: