It is located in the Lower Town and it originates from the eighteenth century. There was a powder magazine at the place of today’s Hamam, which was destroyed in an explosion in 1690, together with surrounding buildings and a part of the old wall, creating a cutting in the hill. In this cutting the Turks made a bathroom, i.e. hamam. In 1944, Hamam was severely damaged as a result of an explosion of another powder magazine. It was reconstructed in 1961 and restored to its original form.

Currently, the Planetarium of the Astronomical Society “Rudjer Boskovic” uses Hamma as their premises.