One of the historic values of the city-Museum Port side is a bath. This is the oldest building was built in the third century (Roman era) by order of the mayor of the city of side. At that time Turkey was a powerful and large prosperous state with a developed trade. She wanted to provide economic and military influence on foreign policy transformation emerging Europe, and one of the most important means to this has been the shipping. Therefore, an important strategic significance possessed each port state. As a result, in the ports created numerous important and unique institution.

An example of such an institution was bath and port side town. It is distinguished by many features from conventional buildings in the city, because, first of all, it was designed to attract visitors, as well as demonstrating all the strength and power of the state. According to ancient tradition, all newcomers are first washed, and then passed to the city.

As the name implies, the bath was located close to the port, to the South of the building of the city theatre. The structure has a rectangular shape, the length and width of which are equal, respectively, 60 and 40 meters. There are four large halls, parallel to each other, and three small rooms. Under the marble floor of the bath was the heating system.

For centuries bath has been repeatedly restored and rebuilt. Over time there was built two gymnastic salon, so the locals could do here exercise. Nowadays Port Bath is in ruins, and in its place remained only destroyed the ancient masonry of stones, but this does not detract from its historical value.