This fine large bath building on an Imperial scale was erected under Hadrian in 127 AD. This complex of buildings was the first in Lepcis to be built largely in marble for both structure and ornament. Outermost was an open air swimming bath surrounded on three sides by porticos and flanked by a pair of colonnaded halls, beyond which, on each side, was a latrine with marble seats on three walls. Four doors from the swimming bath opened onto a corridor surrounding the cold room. The cold room was a hall paved and panelled with marble with a vaulted roof supported by eight columns. At each end of the hall arches opened onto cold plunge baths. At the back of the hall a door opened onto the warm room with a large central bath and two smaller baths at the side. At either side was a super-heated sweating bath. Behind the warm room was a large barrel vaulted hot room with arched windows.

Photo ©1995 Stuart Laidlaw, Michael Halliwell, Institute of Archaeology, UCL
Around the periphery were various rooms including this palaestra or exercise-area:
Photo ©1995 Stuart Laidlaw, Michael Halliwell, Institute of Archaeology, UCL