MOLE (moles), amongst the Romans, was also used for a kind of mausoleum, built in the manner of a round tower on a square base, insulated, encompassed with columns, and covered with a dome. The mole of the Emperor Hadrian, now the castle of St Angelo, was the greatest and most stately of all the moles. It was crowned with a brazen pine-apple, in which was a golden urn containing the ashes of the emperor.