This book explores how smart and sustainable cities become drivers of international competitiveness and global trade. Through an interdisciplinary approach that integrates architecture, urbanism, economics and technology, it demonstrates that advanced urban design not only improves climate resilience and quality of life, but also strengthens the city-brand and attracts investment. The book provides a conceptual and practical framework for understanding the architecture of the future as an economic, cultural and social catalyst, highlighting the importance of ethical governance and digital innovation in building inclusive and strategically competitive metropolises.