This striking museum showcases the Mercati di Traiano (Trajan's Markets), the emperor Trajan's towering 2nd-century complex, while also providing a fascinating introduction to the Imperial Forums with multimedia displays, explanatory panels and archaeological artifacts.
Sculptures, friezes and busts are set out in rooms opening onto what was once the Great Hall. But more than the exhibits, the real highlight here is the chance to explore the vast structure, which historians believe housed the administrative offices of Trajan's Forum.
Rising above the markets is the Torre delle Milizie, a 13th-century red-brick tower.
