trescientosmil is a Barcelona-based think tank committed to the transformation of cities. We combine architecture, urban planning, and data analysis to improve strategic planning and decision-making towards a positive societal change. Phenomena like digitalisation, climate change and social inequality are nurtured and expressed through urban dynamics, altering social pacts and the spatial configurations they define. Understanding these relationships and their delicate balances—working with complexity without simplifying it—is the foundation of our work, ultimately aimed at developing strategies and actions towards new forms of fair and sustainable coexistence.