ancient architecture
black gate
cultural heritage
cultural hub
dark history
defensive line
europe travel
fortification
fortress walls
german cities
german fortifications
gothic architecture
gothic style
historical sites
historical war background
illustration
imperial epoch
imperial rome
landmark
landmarks in germany
magnificent architecture
medieval architecture
middle ages
mighty structure
monuments
outdoor activities
panoramic views
powerful construction
proximity to luxembourg
river moselle
roman empire
roman history
roman influences
scenic beauty
sightseeing
st structure
the great wall of europe
top tourist destinations
tourism
tourist spot
travel
triangular arches
trier
world war ii