1) Ancient Greek sculpture 
A Meniskos (μηνίσκος, plural Meniskoi, English translation: `crescent moon`) is a bronze disk mounted above some Greek statues on an iron nail drilled through the statue`s head. ==Purpose== Since many Greek statues were displayed outside, the meniskos served the simple purpose of preventing bird droppings from accumulating on the statue......
The hat-like protector above the head of a sculpture.