Thirty trillion tons. This is the estimated mass of all human-made matter on Earth, and the starting point for the 7th edition of the Lisbon Architecture Triennale. Curated by Ann-Sofi Rönnskog and John Palmesino, founders of Territorial Agency, the event asks a deceptively simple question: How heavy is a city? To answer it requires more than data. It demands a shift in perception: from the scale of the city to the planetary technosphere.
The technosphere, a term borrowed from Earth sciences, defines the vast system of infrastructures, technologies, and materials that sustain human life while reshaping the planet. Cities, in this view, are not only territories but dense nodes within this planetary metabolism. From October to December 2025, Lisbon becomes a lens to examine that magnitude, hosting three main exhibitions (Fluxes, Spectres, Lighter), a book of essays, a talks program, and more than twenty independent projects across the city.
