the Iron Gates region of the Danube created or enlarged the boardwalk road cut into the cliff-face along the Iron Gate's gorge. A canal was built between the Danube's Kasajna tributary and Ducis Pratum, circumventing rapids and cataracts. Trajan's Forum Traiani was Rome's largest forum. It was built to commemorate his victories in Dacia, and was largely financed from that campaign's loot. To accommodate it, parts of the Capitoline and Quirinal Hills had to be removed, the latter enlarging a clear area first established by Domitian. Apollodorus of Damascus' "magnificent" design incorporated a Triumphal arch entrance, a forum space approximately 120 m long and 90m wide, surrounded by peristyles: a monumentally sized basilica: and later, Trajan's Column and libraries. It was started in 107 AD, dedicated on 1 January 112, and remained in use for at least 500 years. It still drew admiration when Emperor Constantius II visited Rome in the fourth century. It accommodated Trajan's Market, and an adjacent brick market. Trajan was also a prolific builder of triumphal arches, many of which survive. He built roads, such as the Via Traiana, an extension of the Via Appia from Beneventum to Brundisium and the Via Traiana Nova, a mostly military road between Damascus and Aila, which Rome employed in its annexation of Nabataea and founding of Arabia Province. Some historians attribute the construction or reconstruction of Old Cairo's Roman fortress (also known as "Babylon Fort") to Trajan, and the building of a canal between the River Nile and the Red Sea. In Egypt, Trajan was "quite active" in constructing and embellishing buildings. He is portrayed, together with Domitian, on the propylon of the Temple of Hathor at Dendera. His cartouche also appears in the column shafts of the Temple of Khnum at Esna. Games Trajan invested heavily in the provision of popular amusements. He carried out a "massive reconstruction" of the Circus Maximus, which was already the Empire's biggest and best appointed circuit for the immensely popular sport of chariot racing. The Circus also hosted religious theatrical spectacles and games, and public processions on a grand scale. Trajan's reconstruction, completed by 103, was modestly described by Trajan himself as "adequate" for the Roman people. It replaced flammable wooden seating tiers with stone, and increased the Circus' already vast capacity by about 5,000 seats. Its lofty, elevated Imperial viewing box was rebuilt among the seating tiers, so that spectators could