Colour lantern slide of stone Roman arch.. Part of Box 197 'Sayings', Boswell Collection. The Arch of Titus is a 1st-century honorific arch[1] located on the Via Sacra, Rome, just to the south-east of the Roman Forum. It was constructed in c.82 AD by the Roman Emperor Domitian shortly after the death of his older brother Titus to commemorate Titus' victories, including the Siege of Jerusalem in 70 AD.