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.
The Philippines' Pavilion at the 19th International Architecture Exhibition – La Biennale di Venezia presents Soil-beings (Lamánlupa), an exhibition curated by artistic director Renan Laru-an. Through interdisciplinary collaborations, the Pavilion brings together architects, technical experts, indigenous leaders, artists, policymakers, and local communities to explore the cultural, ecological, and technological dimensions of soil. Its objective is to challenge conventional architectural paradigms by shifting the focus from structure to soil, not as a passive material, but as a living force with agency, history, and power.
The Kingdom of Morocco's exhibition at the 19th International Architecture Exhibition – La Biennale di Venezia highlights Moroccan earth architecture and traditional construction techniques. The exhibition, titled Materiae Palimpsest, was curated by architects Khalil Morad El Ghilali and El Mehdi Belyasmine. In an exploration that blends ancient techniques with digital technologies, the exhibit features textile works by architect and artist Soumyia Jalal, along with holograms of artisans and tactile installations. The narrative presents earth as a renewable resource and sustainable material, and earth construction as a key to both preserving architectural heritage and addressing contemporary ecological and social challenges. Materiae Palimpsest offers an invitation to rethink architecture's current relationship with building materials, opening the way to locally rooted construction methods.
Cities today are being reimagined as living, evolving organisms, combining digital intelligence, ecological systems, and new materials to shape radical futures. At Carlo Ratti's "Intelligens. Natural. Artificial. Collective." biennial, over 750 participants challenge established boundaries between architecture, landscape, and technology. Several conceptual projects showcased in the main exhibition challenge conventional boundaries between architecture, landscape, and technology. From bio-adaptive urban systems and Martian water-based settlements to immersive symphonies of satellite data, these works collectively envision new models for cohabitation, resilience, and planetary awareness.
This month's Unbuilt selection presents six speculative projects, presented as part of the 2025 Venice Architecture Biennale exhibition, as provocations for rethinking the future of cities and human settlement. While some proposals transform architecture into self-sustaining, living infrastructures, others explore how data and sensory interfaces can redefine our relationship with natural and urban environments. Together, they offer a cross-section of how architects and designers are using unbuilt work to imagine new possibilities for life on Earth and beyond.
Earth-based flooring materials comprise natural elements such as clay, sand, silt, lime, and organic fibres. They offer both structural performance and sensory engagement when used in both outdoor and interior spaces. Due to their thermal properties, durability, and sustainable qualities, these materials have evolved from vernacular construction techniques into high-value architectural elements that are always being reinvented and optimized. There are several types of earthen floorings, each offering unique benefits, and they are increasingly used in interior settings.
Integrating natural elements into architectural design has long been a fundamental pursuit in creating comfortable, sustainable environments that enhance both individual well-being and the relationship between buildings and their surrounding context. In areas with vast landscapes, incorporating natural elements is essential for seamlessly connecting architecture with its site. Conversely, in dense urban environments dominated by built structures, introducing greenery becomes also increasingly vital, reintroducing nature into the so-called "concrete jungle."
However, beyond conventional landscape features—such as water fountains, green walls, gardens, or courtyards—architects are redefining what it means to build with nature. The focus has shifted toward deeply integrating architecture with its natural surroundings, creating immersive spatial experiences that blur the boundaries between the built and the organic - in a way, "taming" nature. When successfully executed, these designs go beyond fostering well-being or promoting a healthy lifestyle; they evoke a profound sense of tranquility, power, and harmony, transforming the way we perceive and inhabit space.
Swiss architect Valerio Olgiati has unveiled plans for Rruga Adem Jashari, a mixed-use development in Tirana, Albania, that seeks to blend urban living with the surrounding natural landscape. Positioned at the boundary between the city grid and an adjacent park, the project features three distinctive red concrete towers and a central white ziggurat. Combining residential, hospitality, and retail spaces, the development aims to create a seamless connection between the built environment and nature.
Maria Lisogorskaya and Kaye Song of Assemble: Atelier LUMA 2023 Lot 8 Le Magasin Electrique Photo @ Joseph Halligan. Image Courtesy of Bauhaus Earth
Maria Lisogorskaya and Kaye Song from the London-based collective Assemble, along with Lviv-based architects Anna Pomazanna and Mykhailo Shevchenko, have been announced as the 2025 Experimental Fellows at Bauhaus Earth. Selected from 120 submissions, their projects are set to explore earth as a material in contemporary architecture. The annual Bauhaus Earth Fellowship program was established in 2022 by architect Prof. Regine Leibinger. It aims to support diverse projects that explore new modes of practice across various geographies, that can contribute to ecological and social resilience. Fellows receive financial support, mentorship, and access to a network encouraging collaboration among architects, manufacturers, and local stakeholders.
Sustainability has been a central theme in architectural discussions for years, encompassing not only the profession’s role in combating climate change and transitioning to low-carbon economies but also preserving cultural heritage and celebrating vernacular traditions. In 2024, a wave of projects and studies stood out for their innovative use of natural materials, particularly in the Global South. These initiatives skillfully blend creativity and technology with renewable resources, demonstrating how architecture can deliver high-quality spaces that align with contemporary demands for sustainability and environmental responsibility.
Reflecting on the past is often viewed as nostalgia or, from a more critical standpoint, as a sign of regression. However, looking back can offer valuable insights into a society that sometimes appears overly focused—if not obsessed—with the future and technology. In architecture, this reflection allows us to reconnect with our roots and appreciate the knowledge accumulated over generations. It invites us to explore how our ancestors designed durable structures adapted to their environment. Refined through centuries of observation, experimentation, and likely even errors, these systems demonstrate a profound understanding of local materials and building techniques.
https://www.archdaily.com/1020943/heritage-in-mud-stone-and-reeds-rediscovering-ancestral-construction-techniquesEnrique Tovar
Space exploration isn’t merely a testament to human ambition or a quest for new territories and resources. Our ventures beyond Earth’s atmosphere are driven by a deeper purpose: to understand better our place in the cosmos and to pioneer innovations that can transform life on our home planet.
When we think of the word "tropic," the image that typically comes to mind is an exotic space, characterized by perpetual warmth and humidity, with frequent and heavy rainfall nurturing lush vegetation. Throughout history, this tropical climate has been romanticized as a paradise and criticized for potentially fostering weakness due to its perceived clemency.
Thankfully, those judgments and associations have been relegated to the past, paving the way for theoretical and practical projects that outline the advantages and disadvantages of living in a tropical climate. These projects acknowledge the various strategies to enhance human adaptability within these distinctive climatic conditions.
The historical journey of construction also tells the story of humanity. The enduring examples from the past reveal insights into their specific contexts, and the remnants that have survived the elements and decay narrate the development of human technology. In the early days of construction, the common (and often the only) practice available to humans was to use locally available raw materials. For many, this meant building with clay.
By recognizing and analyzing the multiple architectural possibilities of bamboo—a construction material mostly native to warm and tropical areas—the following questions arise: How can we take advantage of its qualities and enhance its use in colder climates? Such regions necessarily require a certain level of thermal isolation in walls, floors, and roofs—but for these climates, we can combine bamboo with materials that complement it.
We spoke with Penny Livingston-Stark, a designer and professor of permaculture who has worked for 25 years in the field of regenerative design based on non-toxic natural materials, to understand the opportunities offered by combining bamboo with earth.
Being one of the first construction methods developed by humans, earth has proven its resilience and durability over time. While construction techniques have evolved and been updated over the years, there is still a long way to explore where the understanding of climate, geographic location, sustainability, structural requirements, and other factors determine its degree of application.
With low environmental impact and the ability to be used through a wide variety of techniques, such as rammed earth walls or 'tapiales,' this material offers the possibility of providing not only aesthetic but also thermal comfort, insulation, and other benefits. With the intention of discovering the different ways it has been used, we set out to select 12 projects distributed throughout Latin America, spanning Argentina, Brazil, Bolivia, Chile, Mexico, Paraguay, Peru, and Ecuador.
With an air of simplicity and wisdom, engineer Julio Vargas Neumann welcomes us. His two dogs accompany us as we descend after the necessary ascent to enter, and we are also accompanied by the stone walls defining the lot. We sit down and begin - or continue - the interview and conversation regarding the value of 'shicras', local materials, and earth construction. We also discuss criticisms of cement, aluminum, and steel, as well as perspectives on the future of materials in Peru and the world. Likewise, we delve into the long-neglected and recurrent rural problem in South America, discussing the inexorable need to change paradigms and priorities.
With the proper know-how, readily available earth, sand, chalk, lime, or gravel can yield a versatile, strong, and durable construction material. Its colorful results vary from region to region, depending on the natural soil component, climate, and treatment. While some prefer to minimize any added processing, others relish the exploration of rammed earth surfaces. Different textures and mesmerizing layers of multitoned or multicolored earth can be used to create a solid surface that enriches the visual quality of a space and carries a sense of warmth to any project.
Rock salt is a chemical sedimentary rock that forms through the evaporation of water, as minerals dissolve and settle down. When excavated directly from the earth, it maintains a cube-shaped crystalline form. With its diverse textures, compositions and structures, this natural element has captivated human interest for centuries. Depending on the region and environmental conditions, salt rock has been found in diverse applications in architecture, such as a construction material that uses blocks of salt to build structures, bricks, or tiles. Often translucent, these bricks allow diffused light to enter interior spaces, creating a unique atmosphere and aesthetic appeal.
Giving this ancient material a modern twist, Casalgrande Padana uses rock salt as the inspiration for its new Supreme porcelain stoneware tile collection. By replicating the colors, texture and brightness of natural sedimentary rock, this collection can be seen as a fascinating journey to discover the unique features of the center of the Earth.
