Form and function. Terms that accompany several definitions that belong to architecture, but more is needed to summarize the practice in 2023. Nowadays, building involves understanding the cycles of materials and how each action can be linked to the extraction of natural resources and their damage to the environment. We live in an urgent need to review the way we produce built space. In this search for models that move away from linear systems and provide a constant process of transformation and redistribution of matter, strategies arising from the circular economy emerge as a possible path. Its application in architectural heritage – for maintenance or restoration – can incentive the necessary changes toward a more sustainable society.