I was especially attracted to the deep dark sky and the reflection in the windows.
Lightroom CC for selective sharpness and dodge & burn
Lastly a great eBook recommendation: one of the best books on "Fine-Art Architectural" photography is, "From Basics to Fine-art"; written by renown photographers Julia Anna Gospodaru and Joel Tjintjelaar. This +400 page book is a great inspiration for everybody that wants to dive into the great world of Architectural Black and white work.
More images of my Frankfurt trip can be found here.
Since Instagram has removed the restriction of only being able to post square images, I have become a much more active Instagrammer; please make sure you follow me on Instagram here!
Remember: "Architecture begins where engineering ends" - Walter Gropius.