Isea, feasts and sacrifices anciently solemnized in honour of the goddess Isis. The Isea were full of the most abominable impurities, for which reason, those who were initiated into them were obliged to take an oath of secrecy. They were held for nine days successively, but grew so scandalous, that the senate abolished them at Rome, under the consulate of Piso and Gabinius. They were re-established by Augustus, and the Emperor Commodus himself assisted at them, appearing amongst the priests of that goddess with his head shaven, and carrying the Anubis.