Natural Building Lab (NBL) is a research-driven, architectural lab within the Technical University of Berlin. It focuses on climate adaptive architecture for a post-fossil fuel society.

The logo references a reciprocal frame – a self-supporting structure – as a nod towards the NBL's non-hierarchical structure and self-build approach. A flexible design system for posters and social media was created to help NBL promote the wide range of events, talks and exhibitions that take place throughout the year.