The Templum pacis, third of the Fori imperiali to be built but the last to be unearthed (recognisable by the potted plants on the west side of via dei Fori Imperiali), was dedicated by Vespasian in AD 75 but devastated by a fire in 192. On display inside this 'Temple of Peace' were the spoils of various wars, including treasures looted from the Temple of Herod during the Sack of Jerusalem in AD 70. The temple's library is now part of the church of Santi Cosma e Damiano.
The immense Forma urbis, a marble map of the city made in 193 by Septimius Severus, once adorned the brick wall to the left of the church's façade. Taking his cue (as always) from the ancient emperors, Mussolini made some maps of his own: four white-and-black marble maps are still visible against the brick wall on the west side of the road. They show an area that includes Europe, North Africa and the Near East, charting the growth of the Roman Empire through antiquity. There used to be a fifth map too, which showed Mussolini's Fascist 'empire', but it was removed after the war.