Architecture photography corner – in pictures.
https://www.theguardian.com/artanddesign/gallery/2017/jan/28/architecture-photography-corner-in-pictures?CMP=Share_iOSApp_Other

In 2014, Sheffield-based photographer and graphic designer Dave Mullen Jr started Geometry Club, a collaborative Instagram project in which people submit images of buildings forming carefully composed triangle shapes. Mullen is now creating an app to simplify the meticulous formatting process, and says the project is “a test of building an audience based on curating the same thing”. The account has attracted more than 25,000 followers and welcomes contributions by professional and amateur photographers. “I quite like the fact that sometimes you look at the photos and it’s not obvious that it’s architecture straight away,” says Mullen.

And in Perpignan some years ago I did these in color. 😊