The presentation introduces the TU Delft Centre for the Just City as an international platform connecting spatial planning, democratic urbanism, and social justice. It frames contemporary urban challenges through the lens of a “polycrisis” marked by inequality, ecological collapse, democratic backsliding, and exclusion, arguing that these crises are fundamentally spatial. The presentation positions spatial justice as an analytical and practical framework structured around distributive, procedural, and recognitional dimensions. It showcases the Centre’s activities in research, education, policy evaluation, and international collaboration, including the Spatial Justice Benchmarking Tool, Justice Readiness Level framework, summer schools, manifestos, and publications aimed at advancing fairer, more democratic urban futures.