Pallium, an open vestment used by the Greeks, Romans, and Byzantines as a cloak, or exterior garment. Some writers say it was of a round, others of a semi-circular form. It was so worn (and much nicety was displayed in its proper adjustment) as to be capable of covering the other habiliments, and even to envelop the whole person. On coins the figures of Jesus Christ, the Virgin Mary, saints, emperors and gods, sometimes appear clothed in the pallium.