Judges 9:53

‘ And a certain woman cast an upper-millstone on Abimelech's head and broke his skull.'

An unknown woman on the tower, seeing Abimelech not far below her, (the tower would not be very high), took her missile, which was a substantial upper-millstone, one used in her mill to grind the corn, roughly about 18 inches (half a metre) in diameter, and 3 inches (8 centimetres) thick, and hurled it down with all her strength on Abimelech. And her aim was good, and it smashed into his head and broke his skull. The tower was fairly low, and the upper-millstone would be fairly prominent, so that Abimelech knew who had thrown it and even in his agony his pride was such that he could not bear the shame of being killed by a woman, even such a redoubtable woman as this.