Kladeos baths, Ancient Roman baths in Olympia, Greece

The Kladeos baths are the ruins of a Roman bathhouse on the western edge of the archaeological site of Olympia, on the bank of the Kladeos river. Built in the 2nd century AD, the roughly 400-square-metre complex had an atrium, an apodyterium, a sweating room and rooms for hot and cold baths, some with bathtubs, under vaulted ceilings. Mosaic floors survive and have been restored; the river has washed away much of the rest.

The baths were built in the Roman period, in the 2nd century AD, at the same time as the nearby so-called Roman guesthouse. They replaced an earlier Greek bath's swimming pool on the same spot by the Kladeos river. Baths were then changing from simple Greek facilities into more luxurious leisure complexes.

The name Kladeos baths comes from the Kladeos river, on whose bank the complex stood at the western edge of the Olympia site. The building replaced an earlier Greek bath's swimming pool, and its mosaics, partly restored, can still be seen on the floors.

The site is accessible as part of the broader archaeological complex at Olympia and can be explored during a visit to the sanctuary. Wear appropriate footwear since the ground consists of ancient stone foundations and uneven terrain that can be slippery in wet conditions.

The southern portion incorporates an advanced heating system that circulated warm air beneath floors and within walls to maintain comfortable temperatures year-round. This technology allowed visitors to use the baths during colder months, representing a sophisticated engineering solution for its time.