Erected in the year 115 A.D. by Apollodorus of Damascus in honour of Trajan, a great supporter of the rebirth of the port of Ancona, the arch was once ornate with statues and friezes that disappeared over the centuries. The arch, wich still features its original elegance and style, was recently restored, and a new lighting design was accomplished to highlight its profile and valorise its particular position with respect to the historical centre of the Town and to Colle Guasco.