A plan of the major section of the northern palace wing of the Herodian palace. Compare this with the archaeologists’ reconstruction. The different rooms in the bath complex have been numbered. Room 1 is the apoditerium, the entrance room where the bathers undressed. Rooms 2 and 3 are tepidaria, one leading to the frigidarium (Room 4) and the other leading to the calderium (Room 5). The solid black walls are built of Roman concrete (see text).