Column of Antoninus Pius (monument) built
161 CE.
Shown on the map at 41.902°, 12.476°.
The Column of Antoninus Pius (Italian: Colonna di Antonino Pio) is a Roman honorific column in Rome, Italy, devoted in AD 161 to the Roman emperor Antoninus Pius, in the Campus Martius, on the edge of the hill now known as Monte Citorio, and set up by his successors, the co-emperors Marcus Aurelius and Lucius Verus. The column itself is now destroyed, but its base is preserved.
Text from the Wikipedia article Column of Antoninus Pius, licensed CC BY-SA 4.0.