I interrupt my month of non-tumbling while in Italy to bring you where I believe the game Amnesia takes place. A museum has recently opened in Viterbo that offers a small (and rather manufactured) tour of tunnels once used to protect the pope from crowds and violence (Viterbo and Orvieto are the only Italian cities outside of Rome that have papal palaces). It was later used during wartime as a bomb shelter, and also as a dungeon.

The game actually takes place in Prussia… It even states so in the game.