As the Occi were employed in the same manner with our modern dining rooms, the Exedra (P) served for the same uses with our withdrawing rooms. They were intended chiefly for conversation. Cicero calls them Cella ad Colloquendum: They were placed near to the eating rooms, and are here lighted from the North.
Next to these we find the different apartments destined for bathing; a practice which the Ancients considered as essential to health; and with regard to all the apparatus necessary for that purpose, they displayed not only great elegance, but the utmost luxury, Here we first enter an Apodyterium (Q), which was a room for undressing, and sometimes contained a Callida Piscina, or Lukewarm Bath (R), so large as to allow of swimming about in it. Next to this is the Cella Frigidaria (S), in which there was a Babtisterium, or Cold Bath. Adjoining to this is the Unduarium (T), or Repository for Unguents, with which the Ancients anointed themselves before their exercises. From this we go into the Cella Tepedaria (U), or Cella Media, so named from its middle degree of heat, and because it was a necessary preparation for the Laconicum, or Cella Caldaria (V), which was a bagnio for sweating in. All these different rooms in the Bathing Apartment were lighted from the roof.