Just days after a devastating fire consumed Notre Dame Cathedral’s roof and central spire, a heated debate has broken out over whether the 13th-century Gothic landmark should be restored or modernized. Firmly in the latter camp is Studio NAB—the Paris–based design practice has proposed topping the 856-year-old cathedral with a giant educational greenhouse.

Envisioned as a beacon for education, solidarity, and biodiversity, this conceptual glass-walled addition follows the original silhouette of the collapsed roofline and central spire, yet provides new programming that the firm believes is more relevant to today's society.

According to ArchDaily, the firm says the design is meant to be “anchored in its time, turned towards the future, and representing the stakes of our time.” Titled “Green For All of Us,” the scheme calls for a multipurpose space where the community can learn about sustainable urban agriculture and beekeeping.

The central spire would be rebuilt into a glass apiary that expands upon Notre Dame’s three existing rooftop hives. The cathedral installed the hives in spring 2013 in an effort to fight declining bee populations, and the bees miraculously survived the fire.

In homage to Notre Dame’s intricate roof structure—dubbed “The Forest” after its 1,300 ancient timber beams sourced from primal forests—Studio NAB proposes reusing salvaged framework elements as planters and furnishings in the greenhouse.

To invite more designers into the conversation, France has launched an international competition for the reconstruction of the central spire. The French president, Emmanuel Macron, has also made the controversial and ambitious promise to rebuild the Notre Dame Cathedral within five years—just in time for the Paris 2024 Summer Olympics.

Related Reading: €845M Pledged to Rebuild Notre Dame Cathedral After Devastating Fire

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Architects Propose a Giant Greenhouse For the Roof of Notre Dame Cathedral