Another Hard Rock pic.
The white marble Arch of Septimius Severus (Italian: Arco di Settimio Severo) at the northeast end of the Roman Forum is a triumphal arch dedicated in AD 203 to commemorate the Parthian victories of Emperor Septimius Severus and his two sons, Caracalla and Geta, in the two campaigns against the Parthians of 194/195 and 197-199. After the death of Septimius Severus, his sons Caracalla and Geta were initially joint emperors. Caracalla had Geta assassinated in 212; Geta's memorials were destroyed and all images or mentions of him were removed from public buildings and monuments. Accordingly Geta's image and inscriptions referring to him were removed from the arch.
Coliseum- The new meets the old. It appears that this wall was added to sure up some crumbling areas of the outer section. The person at the bottom right gives some scale to its height.