In the age of the Anthropocene, in which humanity acts on cycles and systems with all its power and capital, architecture and energy together mean more than operational or embodied energy, active and passive solutions. In the face of the climate crisis, beyond the phase-out of fossil fuels, architecture has a mediating role; it is about socio-cultural rethinking. Disquietude addresses the entanglement between architecture and energy in the 20th century, using Portugal as an example. Featuring different local Portuguese voices, the publication identifies the potential for a transition that could be local, sustainable, diverse, and just and be meaningful also in an international perspective.