Which UNESCO World Heritage Site in the Mosel Valley, Germany, is known for its Roman architecture incuding the Porta Nigra, the best-preserved Roman city gate north of the Alps?
Trier-Ruwer Tryer Trier-Zewen Trier Treves Tréier Trier-Euren Treverensis UN/LOCODE:DETRI Trier valley Ruwer (suburb) Ruwer (Trier) Trier Valley Trier-Ehrang/Quint Trier-Ehrang Trier, Germany Trier-Biewer Trier-West/Pallien
tryer treves ruwer trier trier germany ruwer suburb treverensis trier euren trier west pallien trier un locode detri trier ruwer trier zewen trier ehrang quint trier ehrang trier valley trier biewer tréier
trier
WikipediaEntity
Trier