Built by M. Acilius Glabrione in 181 B.C. after having been offered by his father ten years earlier during the battle of Thermopyli, the temple of the Pietas was in the Forum Olitorium, where the theatre of Marcellus now stands. It must have formed a single complex with the three temples situated near the church of S. Nicola in Carcere, which delimited the side of the forum which faced towards the river. The temple of the Pietas was demolished in 44 B.C. to make way for the theatre. The structures recently discovered on the eastern side of the latter probably belonged to the temple.