Roman sewer in Cologne

Roman sewer tunnel in Cologne, Germany

Below the Spanische Bau in Cologne, fans of Roman architecture find the remains of the ancient Roman Praetorium. Right next to these ruins, visitors have the chance to walk through a former Roman sewer below the streets of the modern city.

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Jahrhunderthalle in Bochum

Jahrhunderthalle in Bochum, Germany

The Jahrhunderthalle is a venue for such famous events like the Ruhrtriennale. Interesting detail: The hall was constructed on top of an existing plant. After that, the soil was risen up to the level of the hall. So the first plant became part of the basement.

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