It has been regularly destroyed by earthquakes, but it has almost always been restored in function of its original style. Its impressive façade of natural sillar overcomes a part of the Main Square, as well as two high and white towers. The huge and wood doors are also worth seeing. The inside has a medium size; moreover, its principal attraction stays in its incredible, immense, white façade. Little anecdote: this is one of the few churches that allow the elevation of the Vatican flag.