The number 17 is considered unlucky for two reasons related to how it is written in Roman and Arabic numerals. In Italy, buildings and hotels often omit the number 17 and it was an unlucky number for the car company Renault. The concept of the Evil Eye curse originating from jealousy or envy is ancient and widespread in Mediterranean cultures. Tests for the Evil Eye curse involve dropping oil in a plate, and the curse can be broken by women's prayers. The Devil's Horn amulet worn by men wards off curses on masculinity, pre-dating Christianity. Various superstitions involve bread, knives, toasting, nails, itches, hanging clothes and sitting positions.