Boston City Hall, Massachusetts, USA

The Era that Redefined Architecture

A Concrete Revolution
published on 20 February 2025
by PJ Reed

6 minutes read

The mid-20th century saw architecture confronting the urgent realities of post-war society through the radical, uncompromising vision of Brutalism. It was a style shaped not merely by creative impulse but by necessity, forcing architects to reckon with material scarcity, the politics of rebuilding, and new ideas of collective life. Yet as it spread from the ruins of Europe to the burgeoning cities of the Americas and beyond, Brutalism produced some of the most challenging and remarkable forms that modern architecture has to offer—structures that both unite and divide opinion decades later.

A Post-War Necessity

The origin of Brutalism is inextricably tied to the aftermath of World War II. Here, the logic of urgent reconstruction played out in shapes and surfaces that refused to disguise their function. The British architects Alison and Peter Smithson, inspired by the concept of "béton brut"—raw, unfinished concrete—set the theoretical foundation for a style that would come to define civic ambition and social housing for a generation.

This focus on unapologetic materiality and geometric form is evident in the monumental structures of the time—whether it’s the sharply projecting horizontals and staccato rhythm of window bays, or the way a building’s basic structure is left exposed as both aesthetic and ethical statement. These choices reflected an underlying belief that buildings, like society after war, must be honest, direct, and enduring.

Boston City Hall, Massachusetts, USA
Boston City Hall, Massachusetts, USA
Anton Grassl / Esto

A Movement Beyond Borders

Although Brutalism originated in Europe, it quickly spread across the globe. The Soviet Union and its satellite states embraced the style as an expression of socialist ideals—massive, fortress-like government buildings and housing projects stood as symbols of power and progress. Eastern European cities, from Warsaw to Belgrade, saw an explosion of Brutalist structures that still define their skylines today.

However, brutalism’s message of strength and transparency found resonance far beyond Europe. In the United States, the movement flourished in the public and educational sectors. The Geisel Library at the University of California, San Diego, stands as a brilliant demonstration of Brutalist ambition and inventiveness. Its distinctive, cantilevered hexagonal tiers expand outward with each storey, a shape that invites speculation even as it asserts physical solidity. The vast, unadorned concrete support structures lift a glass-wrapped reading room skyward, embodying both monumental permanence and futuristic optimism. Both the building’s form and its interplay of shadow and surface speak to the Brutalist ethos: here, the architecture is not camouflaged or softened but celebrated in all its material truth.

Brutalism also manifested in more expressive, even playful, ways. In Montreal, Habitat '67 reimagines the housing block as a cluster of stacked units, concrete boxes interlocked to compose a dynamic mass. The visual logic is one of repetition and variation, with each prefabricated module projecting out to create both private space and an urban sculptural rhythm. Habitat '67 is perhaps the most famous example of Brutalism’s ability to translate raw material into an evocative, human-centred collective vision—an ambition that persists in discussions about communal living today.

Habitat '67 – Montreal, Canada
Habitat '67 – Montreal, Canada

Across continents, the style’s adaptability is pronounced. The Buzludzha Monument in Bulgaria—a vast, circular concrete structure reminiscent of a spaceship or civic altar—symbolises socialist idealism and the state’s presence through scale and form. Meanwhile, the Contraloría General de la Nación in Bogotá soars skyward, its sculptural curves and repetitive bands of fenestration offering a more vertical interpretation of the movement’s typical horizontality. Such buildings demonstrate how Brutalism’s language of exposed concrete could speak of governmental authority as much as social progress.

Buzludzha Monument in Stara Zagora, Bulgaria

Global Brutalist Icons

An analysis of Brutalism’s global reach reveals both thematic unity and fascinating local departures. In the United States, Boston City Hall, built in the 1960s but inspired by the foundations laid in the 1950s, is perhaps unrivalled in its ability to provoke strong reactions. Its façade is a powerful assembly of angular, deeply recessed forms that projects a fortress-like presence in the urban context. The intention, according to its designers, was to embody democracy in concrete, prioritising accessibility and transparency—a message that remains debated but is undeniably evident in the building’s uncompromising geometry.

Educational and cultural institutions also embraced Brutalism with characteristic boldness. Ohio’s Knowlton Hall layers boxy concrete forms over delicate glazed infill, while the Center for Visual and Performing Arts in Massachusetts contrasts mass and lightness, concrete and glass in a balance that feels both monumental and permeable. Similarly, the Wotruba Church in Vienna turns sacred architecture into an experiential landscape, with jumbled blocks that evoke spiritual transcendence through sculptural abstraction.

Brutalist architecture in Latin America is characterised by a blend of climatic sensibility and sculptural innovation. The Innovation Centre in Santiago, Chile, exemplifies this trend: its bold, planar walls and vast voids compose a weighty counterpoint to the open sky, while the raised forms create shady, habitable spaces on the ground. Furthermore, American civic facilities such as the Orange County Offices in Goshen manipulate concrete into rhythmically arched forms, their textured surfaces made more dramatic by interplay with natural light—a testament to the movement’s appreciation for unrefined honesty and urban gravitas.

The Palace of Justice in Brasília is another key example of Latin American Brutalism. Its upward-thrusting facade, viewed from below, is marked by muscular vertical lines and a sequence of grid-like bays. The repetition and scale project judicial authority, while the raw, unfinished surfaces echo the era’s faith in progress and order.

Knowlton Hall — the home of the Knowlton School
Brutalist Orange County Offices – Gohsen, USA
Brutalist Wotruba Church – Vienna, Austria

The Aesthetic of Raw Power

At its core, Brutalism was a rejection of the decorative, embracing instead a philosophy of honesty and function. Repetitive angular forms, deep-set windows, and an overwhelming sense of solidity often marked buildings. The use of exposed concrete, often left rough or imprinted with the texture of wooden moulds, became the movement's signature. This was not architecture meant to charm or comfort—it was meant to endure, to impose, to make a statement.

Critics of Brutalism often labelled it cold, uninviting, and even oppressive. Some viewed its structures as dystopian relics, more akin to bunkers than homes or places of learning. Yet, for its defenders, Brutalism was an expression of optimism—a belief that architecture could be stripped down to its essence and still serve humanity with dignity and resilience.

Innovation Centre – Santiago, Chile
Innovation Centre – Santiago, Chile

Enduring Legacy

By the 1970s, the initial enthusiasm for Brutalism began to wane. Many of its buildings, particularly public housing projects, fell into disrepair, leading to their negative reputation. However, in recent years, there has been a resurgence of appreciation for the movement. Preservation efforts have sought to protect iconic Brutalist structures from demolition, recognising their historical and architectural significance.

The Brutalism of the 1950s laid the groundwork for a broader conversation about the role of architecture in society. While the movement may not have been universally beloved, it undeniably shaped the urban landscapes of cities worldwide. The raw concrete giants of the mid-century continue to stand, weathered but unyielding, as a testament to an era that dared to redefine what architecture could be.