Messina, the third largest city in Sicily, was the most important port of departure for European knights on their way to the Crusades in the Middle Ages. Today, this extensively rebuilt port city still boasts many historically and architecturally significant landmarks, particularly the renowned cathedral with its unusual astronomical clock, the 12th century Catania Church and the ornate Teatro Vittorio Emanuele. Messina is also the starting point for a day trip to the peak of breath-taking Mt. Etna-Crateri Silvestri.