The iconic "square Colosseum" built in Rome by Mussolini in the late 30s is a quintessential example of rationalist architecture. As I walked around the building, I realized that no matter which picture I took, it had to be black & white.

Camera: Nikon Df
Lens: Zeiss 21mm f/2.8 ZF.2 @ f/13
Speed: 1/640
ISO 400
Date: May 26, 2016
Converted to Black & white with Silver Efex Pro 2.