When we think of façades, we rarely think of them as habitats. We see them as the elements that separate interior from exterior, regulate temperature, reduce noise, and protect buildings from external conditions. They give architecture its visual language, but they are also expected to keep the outside world at a distance. In doing so, façades have often been understood as barriers: surfaces that define where human comfort begins and where the environment is meant to remain outside.
But the outside of a building is never empty. For centuries, architecture has unintentionally created opportunities for other forms of life. Birds nested beneath roof tiles, insects occupied cracks in masonry walls, and mosses or plants took root along ledges, gutters, and rough stone surfaces. These conditions were rarely designed with other species in mind, but they created small opportunities for life to inhabit them.
