Habakkuk Monument: A Pavilion of Sustainable Memory at La Citadelle de Quebec

Set against the storied backdrop of La Citadelle de Quebec, the Habakkuk Monument by designer Pe Za is an architectural installation that reinterprets wartime resilience through the lens of sustainable architecture. A shortlisted entry of the "Architecture on the Clock" competition, this medium-scale pavilion pays tribute to the long-forgotten World War II concept of "Project Habakkuk" — a British idea to construct unsinkable aircraft carriers from Pykrete, a composite of wood pulp and ice.

La Citadelle de Quebec, a historic stronghold overlooking the St. Lawrence River, anchors the monument both contextually and historically. As the oldest military building in Canada and a UNESCO site, it receives over 200,000 annual visitors and remains a living emblem of defense and endurance. The Habakkuk Monument is seamlessly woven into this heritage fabric, transforming military legacy into a dialogue with eco-materiality.

Sustainable Materials, Multi-Stage Innovation

The pavilion is constructed in three distinct stages, each reflecting a progressive experimentation with materials:

• Stage One begins with a wooden structure housing a souvenir shop and a sphere maze.
• Stage Two utilizes Pykrete to build a full-scale structure. Compared to ice, Pykrete offers greater structural stability and lower thermal conductivity, making it a resilient yet biodegradable choice.
• Stage Three introduces an exo-skeleton layer made from jute, an organic and tensile material celebrated for its strength, breathability, and cost-effectiveness.

Complementary elements include yellow cedar wood, known for its durability and decay resistance, and CAIS (Custom Air Inflated Structures), which allow quick, lightweight, and modular assembly in changing weather conditions.

Architecture Meets Climate Data

Situated in one of Quebec City's highest points, the site endures extreme winters with snowfall often exceeding 300mm in peak months. Spring is brief and arrives abruptly, offering only a narrow window for construction and assembly. The design considers this climatic volatility through careful material selection and orientation, responding to wind patterns and solar angles as evidenced by detailed wind rose and temperature analyses.

A Gallery of Reflection and Engagement

Internally, the Habakkuk Monument features immersive galleries that allow visitors to engage with both the site’s past and the speculative narrative of Habakkuk. As snow falls over its polygonal facade, the structure becomes both memorial and metaphor — a space that challenges the permanence of architecture while embracing the evolving dialogue of history and ecology.

The Habakkuk Monument is more than a tribute to an experimental wartime technology; it is a poetic and material exploration of resilience, memory, and sustainable innovation. Positioned at the intersection of military heritage and forward-thinking design, it asks: can architecture remember the past while shaping a more sustainable future?