This lecture explores the innovative governance of large urban systems, focusing on telecommunication infrastructure and smart cities. It delves into the concept of smart cities, emphasizing citizen-centric approaches and sustainability. The presentation details TM's platform strategy for smart cities, highlighting its role as an enabler for the smart service ecosystem. Challenges in smart city implementation are discussed, cautioning against unsustainable trends and emphasizing the importance of practical solutions. A real example showcases the impact of digitalization on city management, illustrating how data collection can lead to more informed decision-making.