Only securely identifiable bathing forms are given, with reference to the number/letter of the plan; For tholoi: (preserved or reconstructed) interior diameter and (preserved or reconstructed) number of hip-bathtubs is given; reconstructions are based on approximate completion of partially preserved
examples. If bathing forms clearly belong to different phases, this is indicated, using the same system as in category 4:
changes (subdivided into I, II, III, etc.)
Preserved or reconstructed heating devices are listed and, if possible, ascribed to different phases of the baths; the following terminology is used in the catalog: Firing chamber: area where the fire was made
Furnace: a structure that was supplied with hot air from the firing chamber; it could have different forms (round, bottleshaped,
boilers/cauldrons or basins; this water was used primarily for hipbathtubs, but also to fill individual immersion bathtubs and possibly even collective immersion pools; furnace could also heat adjacent spaces through openings or heating walls. Hypocaust: a subterranean heating system which heated primarily spaces (collective immersion pools, sweat baths, other rooms); in Greek baths, hypocausts commonly consist of simple straight or ring-shaped channels, which were supplied with hot air from the firing chamber. Hypocaust systems also served to keep water warm (in collective immersion pools or individual immersion bathtubs) and occasionally to heat water for hipbathtubs, like furnaces.