Trier, the oldest and most Roman city in Germany, is often dubbed the Pearl of the Moselle, as it is nestled along the fabled Moselle River.

Founded by the Celts in the 4th century BC and later conquered by the Romans, it has baths, monuments and bridges, which made it a UNESCO World Heritage Site.

Today, it is a seven-hour ride from Berlin, but merely 50 kilometers away from the neighboring country of Luxembourg. In addition to its prehistoric archeological museum which highlighted mosaics, Trier is known for its annual Christmas Market and as the birthplace of Karl Marx.

Here are the top five moments during our visit:

Porta Nigra

Known as the Black Gate, it is made of grey sandstone dated approximately 170AD. This entrance serves as the symbol of the city. The oldest defense fort in the Germany, it was reconstructed by French leader Napoleon Bonaparte.

High Cathedral of Saint Peter

Another testament to the city's past, this house of prayer is likewise the oldest in Germany. Although a product of the Roman era, it contains visible Baroque, Gothic, and Renaissance touches. However, the main draw was the Cathedral Treasury which is said to contain the Holy Tunic of the Seamless Robe of Jesus, which he had just prior to the Crucifixion.