This lecture explores the concept of latent futures in architecture, focusing on speculative design interventions and urban transformations. The discussion delves into the intersection of past, present, and future in architectural practice, highlighting the role of imagination and creativity in shaping built environments. Through a series of case studies and design projects, the lecture showcases innovative approaches to reimagining urban spaces and addressing contemporary challenges. The speakers, including Pierre Janin and Sebastien Marot, offer insights into the potential of architecture to provoke critical reflections on societal issues and propose alternative visions for the future.