Felt a little lonely in a busy piazza, and if you're not careful it can be overwhelmed by the more imposing Victor Emmanuel memorial across the way. But historically and in terms if artistic significance there's no comparison - Trajan's trumps.
The cylindrical pillar is a propaganda tools extraordinaire, with an incredibly long, well, stone cartoon wrapped around in a continuous strip. The story told by the dozens of images highlight the emperor's life and achievements. Think of it as a much longer Bayeux Tapestry, done centuries earlier and in stone. Shouldn't be missed by students of history, though the story outlined in the reliefs honestly can be better appreciated in books or other resources. A bit hard to see from the ground and nowadays if you walked circles around the column to see them in sequence you'd surely get some strange looks!
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