Guten Tag! Found your tb. We also visited the beautiful Koln cathedral quite a few years ago. That day it was raining heavily and so the interior of the cathedral was darker inside and so the beauty of the colors of the stain glass windows was not easily seen. It was a fabulous trip, visiting with German friends and touring.
We are moving your tb from the Eye Clinic in Waupun, Wisconsin on a misty rainy day. Hope to drop it in a tb hotel at a Dental Clinic in West Bend, Wisconsin. FUN4ks