PILA, was a ball made in a different manner according to the different games in which it was to be used. Playing at ball was very common amongst the Romans of the first distinction, and was looked upon as a manly exercise, which contributed both to amusement and
health. The pila was of four sorts: 1st, Follis or balloon; 2d, Pila Trigonalis; 3d, Pila Payanica; 4th, Harpastum. All these come under the general name of pila. For the manner of playing with each of them, see the articles FOLLIS, TRIGONALIS.