If you are in Pula, definitely make it a point to come see this as it's around a 10 minute walk from the Amphitheater. It's not worth a separate trip to Pula just to see this but if you are seeing the other sites it's worth it to come see this for the Roman history that is behind it. You can walk under it & there always seem to be a lot of people around it. It only takes a few minutes to see so its a short stop.
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