The story
The BdB was founded in 1951 in Cologne as an Eingetragener Verein, succeeding the pre-war Centralverband des deutschen Bank- und Bankiergewerbes (1901-1945), which was based in Berlin. In 1999 it moved back to Berlin, while its the publishing subsidiary Bankverlag remained in Cologne. The association also maintains an office in Brussels.
From Wikipedia’s article on Bundesverband deutscher Banken, shared under CC BY-SA 4.0.5