Trier

Trier is rich in ruins from the Roman Empire protected by UNESCO, such as the

Porta Nigra
gate

the Roman baths the Kaiserthermen

a Roman amphitheater which used to host 20,000 spectators.

Geburtshaus von Karl Marx
is where Karl Marx was born, in 1818.
Judengasse
an a former Jewish Street, that now houses different bars.
Trier Cathedral
incorporates part of a church built by Emperor Constantine and contains the relic of the Holy Robe.

The Liebfrauenkirche is one of the earliest Gothic buildings in Germany.

Rheinisches Landesmuseum, Trier
one of the most important archeological museums in Germany
Open air museum Roscheider Hof
an ethnological museum of the Saar-Mosel-region. About 5 km south from the city center.