Looking for an annotated hand drawing of Alexanderplatz —can anyone help?

Hi everyone,
I’m searching for an annotated hand-drawn illustration of Alexanderplatz, ideally something that provides context or highlights key architectural and urban features. It could be a historical drawing, a competition sketch, or even a conceptual plan.

I’ve already explored sources like architectural archives and firms connected to Berlin’s urban planning, but haven’t had much luck finding something specific and annotated. If you know of any online databases, museums, or even personal collections where I might locate such a drawing, I’d be really grateful for any tips or links!

Thanks in advance for your help!