Does any have a good suggestion of hotels, B&Bin Koln?
We like the Hotel Coellner Hof. It is simply a very lovely, reasonably priced hotel with one of the best breakfast buffets we have ever had. We have stayed here twice and enjoyed it each time. Location is about a 10 min. walk from the train station. http://www.coellnerhof.de/
We stayed at the Hotel Domstern. It is currently rated #2 of in excess of 200 Koln hotels on tripadvisor. It is quite inexpensive as well. Nice breakfast. Less than 5 minute walk from the train station and Cathedral. At the time we were there there was street construction on the main street outside the train station (side opposite the cathedral) and we had a bit of difficulty finding our way. But it is close and very direct if there are no obstacles.