Porta Nigra, Trier

The largest Roman city gate north of the Alps, built around 170 AD from huge sandstone blocks without mortar, and darkened over the centuries, hence its name, the 'black gate'. You can climb inside for a view over Trier, Germany's oldest city.

Trier's Roman monuments, including the Imperial Baths, the amphitheatre and the vast Basilica of Constantine, are a UNESCO World Heritage Site, along with the cathedral. Karl Marx was born here. Trier is in the Moselle wine region, close to Luxembourg.

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At a glance

Kind	Historic sites
Where	Porta-Nigra-Platz, Trier, Rhineland-Palatinate.
Cost	Small entry fee

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Germany

Capital	Berlin
Continent	Europe Western Europe
Population	83,517,030
Languages	German
Currency	Euro (EUR, €)
Calling code	+49
Time zone	UTC+01:00 (CET)

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