Summary of Spolia

Overview of Spolia

This episode of 99% Invisible explores the architectural practice of spolia—the reuse of materials from older buildings in new construction—through two connected stories: the grassroots revival of Granby in South Liverpool and the history of ancient Rome. The episode argues that reuse is not just a cost-saving measure, but a way of preserving memory, meaning, and value. It also makes the case that, in an era of climate change and material scarcity, spolia is becoming less of a historical curiosity and more of a necessary design strategy.

Granby: Reclaiming a Neighborhood Through Reuse

A neighborhood written off as worthless

• Granby, once a lively and diverse neighborhood in Liverpool, was devastated by unemployment, aggressive policing, and failed redevelopment.
• The local government forced residents to sell their homes, then stripped and boarded them up.
• Signs were placed on the houses saying “All items of value have been removed from this property”, meant literally by officials—but symbolically wrong.

Residents refused to let the neighborhood disappear

• A small group of residents stayed and gradually began reclaiming the area.
• They cleaned lots, planted gardens, painted boarded-up houses, and organized into a Community Land Trust (CLT).
• Their goal was to renovate the homes as affordable housing and bring former residents back.

Assemble and the creation of “Granby Rock”

• Designer Lewis Jones and the collective Assemble joined the effort.
• As houses were renovated, salvaged debris—broken brick, slate, and rubble—was transformed into a material called Granby Rock.
• This rubble terrazzo was used to make fireplaces and mantelpieces installed back into the renovated homes.
• The result was both practical and symbolic: the neighborhood’s wreckage became part of its renewal.

What Spolia Means

The core idea

• Spolia refers to reusing materials from older structures in new ones.
• Humans have always reused building materials out of necessity, but spolia carries extra meaning: the old material brings its history and authority into the new context.
• The episode emphasizes that reuse is not just recycling—it can be a form of storytelling, preservation, or political messaging.

Famous examples

• The practice appears in major historic buildings such as:
  • Hagia Sophia
  • Notre Dame
  • The Great Mosque of Córdoba

Rome and the Politics of Reuse

Roman architecture as power

• The Roman Empire used monumental architecture to project permanence, wealth, and legitimacy.
• Emperors like Augustus, Hadrian, Trajan, and the Flavians built iconic structures to ensure they would be remembered.

Crisis changed the material reality

• From the mid-3rd century onward, Rome was hit by overlapping crises:
  • civil war and political instability
  • invasions and border pressures
  • the Plague of Cyprian
  • climate-related crop failures and drought
  • hyperinflation
• With trade routes disrupted and quarries harder to access, fresh marble became difficult to obtain.
• Old buildings became a convenient source of usable material.

Constantine and the triumphal arch

• Constantine became the key figure in normalizing reuse on a grand scale.
• His arch near the Colosseum included sculpted panels taken from earlier monuments.
• These reused panels were not just practical; they were politically useful:
  • they linked Constantine to Rome’s “golden age”
  • they re-presented him as inheritor of imperial greatness
• This was reuse as propaganda.

Public backlash and legal resistance

• Ordinary Romans often hated the stripping of old buildings, which made neighborhoods feel degraded.
• Later laws tried to limit stone theft, but enforcement was weak.
• The tension between preservation and salvage became a defining feature of architectural reuse.

How the Meaning of Spolia Changed

From insult to neutral term

• The term spolia was coined during the Renaissance by scholars who were horrified to see ancient Roman material embedded in medieval churches.
• It originally carried the sense of “spoils of war”—a judgment that the old world had been pillaged.
• Over time, the term became a neutral academic descriptor.

Spolia after Rome

• Roman materials were reused across Europe and beyond:
  • Roman tiles in English churches
  • stonework in Charlemagne’s chapel
  • columns in mosques across the Islamic world
• The practice outlived Rome and spread wherever old structures could be mined for new ones.

Why This Matters Today

Modern construction is wasteful

• Today, most building means demolish and replace.
• New materials are usually cheaper, more standardized, and easier to specify.
• But the episode argues this model is environmentally unsustainable because of embodied carbon—the emissions involved in extracting, manufacturing, transporting, and installing new materials.

Reuse as climate strategy

• Architects and researchers increasingly argue that reuse must become normal again.
• Challenges include:
  • uncertainty about the condition of reclaimed materials
  • lack of reliable supply chains
  • buildings not being designed for disassembly
• The episode frames this as a design problem that future construction must address.

Examples of future-facing reuse

• Some traditions already anticipated this:
  • Japanese temples built with joinery that allowed them to be taken apart and reassembled
  • The Paris 2024 Olympic Village designed to convert into housing afterward
• These examples suggest buildings should be planned for their next life, not just their first.

Granby’s Larger Lesson

Value is not only monetary

• The episode contrasts three ideas of value:
  • Roman value: prestige, power, and continuity
  • Granby’s value: memory, community, and care
  • Modern climate value: conserving finite resources
• In Granby, salvaged material became proof that the neighborhood still mattered.

The workshop’s evolution

• The Granby workshop did not end when the first homes were restored.
• It evolved into an ongoing studio producing recycled architectural tiles and ceramics.
• This reflects a broader shift from symbolic reuse to practical sustainable reuse.

Main Takeaways

• Spolia is reuse with meaning: old materials carry historical, cultural, and emotional weight.
• Granby shows that debris can be transformed into dignity: the neighborhood’s rubble became part of its recovery.
• Rome helped normalize reuse at scale: especially under Constantine, who turned old monuments into tools of political messaging.
• The modern built environment is too extractive: reuse will be essential for sustainability.
• The signs in Granby were wrong: even stripped-down buildings and demolished materials can still hold value.

Notable Insight

The episode’s central idea is that materials are never truly “valueless.”
They may lose their original use, but they can still carry memory, identity, and future possibility.