After a nice breakfast at the Luxembourg Marriott Hotel Alfa, we took the train over to Trier, the oldest city in Germany. Starting at the ancient Porta Nigra, we saw the Kirche St. Gangolf, Trierer Dom, and Konstantin Basilika churches. After lunch, we toured the ancient Roman Kaiserthermen, Amphitheater, Barbarathermen, and Thermen am Viehmarkt. We ended the visit with döner before returning to Luxembourg in the evening.