The Faustina-Bath built in the 2nd century AD, is the youngest and largest bathing and sports complex in Miletus.
It was probably donated by Faustina the Younger, daughter of Emperor Antoninus Pius and wife of the Roman Emperor Mark Aurelius (161 - 180 AD) on the occasion of the visit of the Emperor's wife to Ephesus. An inscription testifies that the spa was already called the "bath of Faustina" in ancient times.
In the case of the Faustina baths, the successive rooms form a ring at the end of which the user had the opportunity to enter the adjacent palaestra with its 62 x 64 m, unpaved courtyard after passing through the apodyterium (changing room).