The mausoleum, which measured 30 x 30 feet at its base and stood more than 70 feet tall, contained three rooms, one on top of the other (see section drawing). The lowest room was within the podium, which supported a vaulted room above, surrounded by pilasters topped with a Doric frieze and a decorated cornice. The uppermost room, which may have housed Herod’s sarcophagus, was circular and surrounded by a portico of 18 columns that supported an architrave, soffit frieze and decorated cornice (see reconstruction). The curved conical roof, which probably looked much like the well-known Absalom’s Tomb in Jerusalem’s Kidron Valley, was crowned by a decorative urn at its top, as well as four around its base.