This thesis initially offers an in-depth analysis of the evolution of architecture as an expression of the future, culminating in the Solarpunk movement, an optimistic and sustainable vision of the built world. The focal point of the research, the Solarpunk movement, is examined in its origins and analyzed through a critical lens that encompasses literature, cinematography, society, economics, engineering, and artificial intelligence. The Solarpunk Manifesto by Adam Flynn and Missy Sturge emerges as a key reference point for interpreting this vision. The thesis continues with a section on Solarpunk Architecture, which introduces the speculative approach through media and design scenarios. Through the writing of the Solarpunk Architecture Manifesto, several architectural projects, both built and unbuilt, are studied and analyzed.