And also I had a meeting with Dr. Andrea Zupancic in the Stadtarchiv Dortmund, which was also important for my research. Thank you for the prospect of the old images. What was interesting for me to see: already some centuries ago there was a small lake at the place in Hörde, very near from the Phoenix See today. You can say: the lake moved. The change is not one-way. It is more a continuous process.