The massive 1st-century AD monument is not only a porta (city gate) but also part of the Acqua Claudia aqueduct. It gives you an idea of the grand scale of ancient Roman public works. On the Piazzale Labicano side of the portal, to the east, is the curious Baker's Tomb, erected in the 1st century BC by a prosperous baker. Look closely -- the tomb is decorated with stone ovens and charming friezes with scenes of the deceased's trade.
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