- bbc.com travel/article/20130114-mini-guide-to-…Cologne’s geographical, medieval and spiritual heart is the Kölner Dom – the city’s magnificent cathedral, built over seven centuries and completed in 1880.
- newworldencyclopedia.org entry/CologneHistory
- alt Reconstruction of the Roman city of Cologne.
- Chorweiler, a social housing development from the 1970s in the north of Cologne.
- germanytravel.blog cities/cologne/things-to-do/While the iconic Cologne Cathedral is what brought global attention to this city, there's so much more things to do in Cologne.
- germany.travel en/cities-culture/cologne.htmlCologne is known for its joyous attitude and party spirit. The city is a matter of the heart, an emotion and an unfalteringly positive state of mind.
- bizyineyollarda.com en/cologne/The city of Cologne, through which the Rhine, Europe’s largest river, flows, is Germany’s 4th largest city in terms of area.
- instagram.com colognesworld/21K Followers, 459 Following, 941 Posts - See Instagram photos and videos from Cologne | Travel community (@colognesworld).
- booking.com city/de/cologne.tr.htmlJust 4 km north of the Kölnmesse exhibition centre, this hotel in Cologne's Mülheim district offers modern rooms and excellent links with the A3 motorway.
- thecrazytourist.com 25-best-things-cologne-…And for refreshment in between the Romanesque churches and museums, Cologne is the city with the most pubs per person in Germany.
- int.bahn.de en/destinations/cologneIt is famous for its cathedral, on which construction began in 1248 and is still in progress. Cologne has more than 30 museums and numerous art galleries.
- moonhoneytravel.com europe/germany/cologne/We lived in Cologne for one year and we can say with much assurance, you won’t understand Cologne until you’ve experienced Karneval.