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Trier

Germany's oldest city: Augustus' colony on the Moselle, an imperial capital of the Tetrarchy, guarded by the Porta Nigra.

Dated events and their evidence

• 16 BCE mainstream
  founded as Augusta Treverorum source
• 293 CE mainstream
  imperial residence under the Tetrarchy; up to 100,000 inhabitants source
• 310 CE disputed
  Porta Nigra built under Constantine (4th century); best-preserved Roman gate north of the Alps source
• 1986 CE mainstream
  UNESCO: Roman monuments, cathedral and Liebfrauenkirche source

Where

49.7567° N, 6.6414° E

Sources

• https://en.wikipedia.org/wiki/Trier
• https://en.wikipedia.org/wiki/Porta_Nigra

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