Arch of Septimius Severus

The Arco di Settimio Severo is a large structure found in Assassin's Creed: Brotherhood. It was located in the cit of Rome

Database Entry
''Standing at the foot of the Campidoglio in the Roman Forum, the Arco di Settimio Severo is a triumphal arch commemorating the Parthian victories of Emperor Septimius Severus. After Septimius died, his sons Caracalla and Geta shared rule as joint emperors. However, in 212, Caracalla had Geta assassinated and subsequently destroyed all records of Geta's existence including Geta's image and inscriptions on the arch. I guess a healthy sibling rivalry wasn't so healthy for Geta.''