Luc Deleu (b. 1944, Duffel, Belgium) is an architect and urban planner internationally recognised for his pioneering vision that redefines the ethical and global dimensions of architecture. In 1970, he founded T.O.P. office (Turn On Planning), a collective practice operating at the crossroads of architecture, art, and social critique. Deleu’s projects — ranging from the conceptual “Orban Space” to speculative large-scale infrastructures — challenge conventional notions of functionality, authorship, and urban scale. His work has been exhibited widely, including at M HKA (Antwerp), Bozar (Brussels), and CIVA (Brussels), and is held in major public collections. Deleu continues to influence generations of architects and thinkers through his teaching, writings, and his ongoing inquiry into the balance between the built environment and planetary responsibility.