Italy is home to many weird and wonderful superstitions, with many still practised by Italians today. Italians are very superstitious and for them, nuns and ambulances are associated with death.

Italian culture is rich with superstitions, both good and evil, and many of them pervade everyday life, such as tossing a pinch of spilled salt over the left shoulder to ward off bad spirits. Some are rooted in ancient history, based on religious beliefs or communal rites.

Source: http://bostoniano.info/momento/italians-superstitions/