Lonely Planet says:
"Cologne (Köln) offers seemingly endless attractions, led by its famous cathedral whose filigree twin spires dominate the skyline. It’s regularly voted the country’s single most popular tourist attraction. The city’s museum landscape is especially strong when it comes to art but also has something in store for fans of chocolate, sports and even Roman history. Its people are well known for their liberalism and joie de vivre and it’s easy to have a good time right along with them year-round in the beer halls of the Altstadt (old town) or during the springtime Carnival.
Cologne is like a 3-D textbook on history and architecture. Drifting about town you’ll stumble upon an ancient Roman wall, medieval churches galore, nondescript postwar buildings, avant-garde structures and even a new postmodern quarter right on the Rhine. Germany’s fourth-largest city was founded by the Romans in 38 BC and given the lofty name Colonia Claudia Ara Aggripinensium. It grew into a major trading centre, a tradition it solidified in the Middle Ages and continues to uphold today."
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