In autumn 2025, Lisbon will once again become the beating heart of architectural and urban exploration. The 7th Lisbon Architecture Triennial, staged from 2 October to 8 December 2025, invites people to ponder the question: "How Heavy is a City?", by entering a world of imagination, reflection and discovery, and starting a conversation about the future of urban life.
Cities today are extraordinary creations, growing at an overwhelming pace and reshaping the planet in ways we’re only beginning to understand. They demand immense amounts of energy, materials, and data to thrive, expand, and adapt. But they’re not just about building—they’re also spaces of destruction, erosion, and even extinction. To truly grasp the phenomenon of urbanization, we need to look beyond the traditional idea of a city, beyond its visible boundaries, and explore its far-reaching impacts.

Curators Ann-Sofi Rönnskog and John Palmesino challenge us to rethink what a city really is: "The word 'city' is familiar to us all, yet its meaning has transformed over time. What is a city today? Where does it begin and end? How can we measure it, and what does it mean to live within its ever-changing boundaries?"

The journey into this theme begins with a glance at Lisbon’s past. The Great Earthquake of 1755 didn’t just reshape the city physically—it sparked a monumental conversation about humanity’s relationship with the Earth. It led to innovations in architecture and technology as tools to stabilize human life against nature’s unpredictability.
Fast-forward 270 years, and the situation is reversed. Today, human actions rival natural forces in their magnitude and impact. The Triennale provides a stage for architects, artists, scientists, and policymakers to gather and reflect on these groundbreaking changes. Together, they’ll explore the forces transforming the spaces we inhabit, from cutting-edge technologies to environmental challenges, and examine how architecture can shape a sustainable future.

This celebration of ideas takes place across five of Lisbon’s most iconic cultural spaces, each offering unique experiences:
Since 2007, the Lisbon Architecture Triennale has been more than just a festival—it’s a global platform for dialogue and action. It’s a place where architecture becomes a force for social change.
The city is waiting for you. Will you answer the call?
>>> Discover the sixth edition of the Lisbon Architecture Triennale
Cover Image ©Pedro Sadio, courtesy of Lisbon Architecture Triennale