Aventicum, now called Avenches is located somewhere in western switzerland, and was the most important city in switzerland on the route from the rhone valley in the south to Germania in the north.
And when you're standing in a field on one of the surrounding hills, near the eastern gate (which was a really big one, leading the eye directly to the important areas of the city)... Well, maybe you can imagine how it was... Standing there, many centuries ago, when the roman empire was still intact.
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