In the Greek city of Thessaloniki on the street via Ignatia are an ancient Turkish bath "Hamam Bay" also known as "heavenly bath".

During the five centuries of domination of the Turks in Thessaloniki were built many different religious and public buildings. Baths "Hamam Bay" were the first and the biggest Turkish baths in Thessaloniki. They were built in 1444 by decree of Sultan Murad II. This is one of the most significant monuments of the Ottoman era, surviving not only in Thessaloniki but also throughout Greece.

In the complex "Bey Hamam" were equipped with both male and female parts. However, the male was much more spacious and furnished much more luxurious. Both parts had a standard layout and suggested the presence of three separate zones – cold, cool and hot, where they were equipped with marble pools and there was an additional separate room, which was maintained at an even higher temperature. Water in the pools was supplied by a built-in wall of clay pipes from a special tank. Furnace, located under a large metal boiler, heated water, thereby forming a vapor, which is getting into a special heating system located under the floor, provided the heating of the room. Additional heating was carried out and by means of vertical ducts located in the walls.

Bath "Hamam Bay" remained in use until 1968, after which they were transferred to the Greek archaeological service. After the devastating earthquake of 1978, which caused massive damage to Thessaloniki, Turkish baths have been restored and are today an important historical monument and open to the public. It also regularly hosts various exhibitions and other cultural events.