This custom Google Map contains the institute, restaurants, train stations, hotels for your stay in Cologne
Please remember that the City of Cologne has the peculiarity of charging a tourist tax of 5%, that gets added to the cost of the hotel, and that you can avoid this tax by filling in the following form
getting it stamped at your home institution, and presenting it at your hotel reception.
Chelsea Hotel
Jülicher Str. 1
50674 Köln
https://www.hotel-chelsea.de/
Hotel Hopper St. Josef
Dreikönigenstraße 1-3
50678 Köln
https://hopper.de
Hotel Flandrischer Hof
Flandrische Straße 3-11
50674 Köln
https://www.flandrischerhof.de/