The Arch of Trajan in Ancona is a Roman triumphal arch erected in 115 by the Senate and people of Rome in the reign of Emperor Trajan. It was built in honour of that Emperor after he expanded the port of the city out of his own pocket, improving the docks and the fortifications. It was from here that Trajan departed for the ultimately successful war against the Dacians, an episode which is commemorated in the bas relief of Trajan's column in Rome.
The arch was the work of the Roman, a Greek Syrian architect Apollodorus of Damascus, born in Roman Syria. Made of marble from the quarries of Marmara Island, it stands 18.5 metres high on a high podium approached by a wide flight of steps. The archway, only 3 m wide, is flanked by pairs of fluted Corinthian columns on pedestals. An attic bears inscriptions. The format is that of the Arch of Titus in Rome, but made taller, so that the bronze figures surmounting it, of Trajan on horseback, his wife Plotina and sister Marciana, would be a landmark for ships approaching Rome's greatest Adriatic port.