After you pass through the ticket booth but before you enter the Roman Forum, you will encounter the Arch of Titus. This very impressive triumphal arch is a tribute to Titus for his military success against Jerusalem during the First Jewish-Roman War. Oddly, at the same time he was having an affair with Berenice of Cilicia. She was a Jewish queen. Nine years later, he became the tenth Roman Emperor. When he died after a brief two-year reign, his brother Domitian commissioned this memorial. The arch was completed in 81 AD.