Trier, the oldest city of Germany, is present on the bank of River Moselle. It is the principal city of northern Roman territories and is merely 15 km from Luxembourg. Many key sights are present in the old town. People can explore the town by walking or by a special train â€˜Romer Express.â€™ There are eight heritage sites preserved by UNESCO. Trier's heart lies in Hauptmarkt, the largest market square in the city. Townhouses are encircling the plaza, and the colorful Steipe building is alluring. Famous Karl Marx museum depicts his life and concepts, and it is only 10 minutes away from Hauptmarkt. Trier Cathedral is the oldest in Germany and shows the amalgamation of Baroque, Gothic and Roman architecture. Dreikoenigenhaus, The House of three Magi is the eye-catching building present in Simeonstrasse. Nightlife in Trier is exciting as there are many good options for restaurants and hotels too.