Architecture is a collective knowledge produced through the efforts of a multitude. Within this multitude, two forms of collaboration unfold: a synchronic one, which connects producers operating in the same moment, and a diachronic one, which connects all design attempts in a multifaceted Architectura Universalis. Synchronic collaborations end up producing single things, crystallizing a multiplicity of desires in a single hybrid object. Diachronic collaborations emerge as relationships connecting distinct objects, with genealogies slowly (and unpredictably) developing across time and space. Synchronic collaborations are based on diachronic ones. The possibility of collaboration now relies upon a broader agreement with all previous archite...