The biggest thermal complex in Miletus. It is only 150 m away from the theatre to the south. The Faustina Baths, built by (and named for) the wife of Roman Emperor Marcus Aurelius in the second century C.E. The construction of these baths (161-180 A.D.), one of the most remarkable buildings in Miletus, was made possible by money donated by Faustina, the wife of the Roman Emperor, Marcus Aurelius. The bath does not match to the original plans of Miletus, drawn by famous architect Hippodamos. The structure was renovated and reopened during Anastasius era (early Byzantine Empire 491 -518 A.D.)
There exists a big courtyard with palaestra (colonades around) and dressing rooms in which a statue of Apollon stood. The statues of Lyrile, Apollon and the armoured torsos excavated from the hall are now in Berlin. The statues of Muses and the statue of Aphrodite are in the Istanbul Archaelogy Museum now.
This enormous complex included a dressing room, cold room, warm room, hot room, steam room and exercise room. Parts of this colossal building of brick and dressed stone blocks are still standing. One of the most remarkable features is the palaestra, the imposing remains of which lie immediately adjacent to the baths themselves. Beside the pool in one of the cool rooms (frigidaria) is a statue of Meandros, the river god.
On the east is the hot room (caldarium) with walls reaching a height of 15 m. There is another frigidarium on the south, together with a dressing-room, or apodyterium. A stoa extends along the other side of the street. People came here to bathe, exercise, sweat, gossip and be massaged. Only the frigidarium, the cold water pool can still holds water. A statue of the river god Maindros and a crouching lion keep silent watch over a pool.