<p>If you are a Roman history buff, there is a nice Roman museum nxt door to the cathedral in Koln.<br>
<a href=“Römisch-Germanisches Museum Köln”>http://www.roemisch-germanisches-museum.de/Startseite</a></p>
<p>Since you are visiting during winter, the museum will offer you an opportunity to get warm.<br>
The exhibit captions are all in German, but the museum is worth visiting. It has a nice collection. The most spectacular, world-class, ancient Roman collections in Germany are at Rheinisches Landesmuseum museum in Trier, and at the Pergamom Museum in Berlin. </p>