Trajan's Column (Italian: Colonna Traiana, Latin: Columna Traiani) is a Roman triumphal column in Rome, Italy, that commemorates Roman emperor Trajan's victory in the Dacian Wars. It was probably constructed under the supervision of the architect Apollodorus of Damascus at the order of the Roman Senate.

The most famous and historically significant pillar in Rome is Trajan's Column, located in Trajan's Forum near the Piazza Venezia. Completed in 113 AD, this 38-meter-tall (125-foot) marble monument was designed by the architect Apollodorus of Damascus to commemorate Emperor Trajan's victory in the Dacian Wars. What makes it world-renowned is its spiral frieze, an intricate "stone movie" that winds around the column 23 times, featuring over 2,600 carved figures in 155 distinct scenes. This relief provides an invaluable record of Roman military life, tactics, and equipment. Inside the column is a spiral staircase of 185 steps that leads to a viewing platform at the top, which was originally crowned by a bronze statue of Trajan (replaced by a statue of Saint Peter in 1588). The base of the column also served as a tomb for the ashes of Trajan and his wife, Plotina. It remains remarkably well-preserved in 2026 and served as the architectural model for many other triumphal columns, including the nearby Column of Marcus Aurelius.