Historically, architecture and the built environment have insisted on creating flat, hard surfaces. In earlier eras, walking without paved ground meant mud-caked shoes, uneven footing, tripping hazards, standing water after rain, and high maintenance. Hence, as we shaped cities, we prioritized a smooth, continuous, solid horizontal datum. The benefits are real: easier walking, simpler cleaning, and straightforward programming—furniture, equipment, and partitions all prefer a level base. This universal preference for building on flat ground remains the norm and, for many practical reasons, will likely continue to be.

What's less recognized is that making a truly flat surface is surprisingly difficult—and many well-executed "flat" floors aren't perfectly flat at all. They are often gently sloped, calibrated to precise gradients for drainage. While interior spaces do not always require this, many ground floors and wet areas do incorporate subtle inclines as a safeguard—whether for minor flooding or to manage water that overflows from the street or plumbing when one of the discharge systems is malfunctioning.

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The Royal Architectural Institute of Canada (RAIC) has announced the four projects shortlisted for the 2017 Moriyama RAIC International Prize. The prize was established in 2014 by Canadian architect Raymond Moriyama along with RAIC and the RAIC Foundation to recognise buildings that are judged to be " transformative within its societal context and reflect Moriyama's conviction that great architecture transforms society by promoting social justice and humanistic values of respect and inclusiveness."

"These projects celebrate human life and shape activity," commented RAIC President Ewa Bieniecka, FIRAC. "They embody innovation, contribute to how we experience space, and explore how spaces allow opportunities for freedom. The four shortlisted projects demonstrate how architecture is generous and gives back to the community. These works have a strong sense of place and connect to their surrounding landscape."

Awarded every two years, the winning project will receive a CAD $100,000 prize and a handcrafted sculpture by Canadian designer Wei Yew. The prize is open to all architects, irrespective of nationality and location. The inaugural prize was won by Chinese architect Li Xiaodong for his design of the Liyuan Library in Jiaojiehe, China.

See the shortlisted projects, after the break.

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