alveus

The calidarium had the labrum at one end, and the alveus was in one side of the room.

At one end of the caldarium we find the bath basin, alveus; at the other is the support of the labrum, which has disappeared.

At the other end stood the large hot water tank (alveus), in which the bath was taken by a number of persons at a time.

The square basin (alveus or baptisterium) which served for the warm baths was of marble.