Installed to coincide with last year's UN Climate Change Conference, the Circular Pavilion has been created as a model for recycling in architecture.

"This building follows the principles of the circular economy, where one person's waste is another's resource," says the pavilion's website.

The most striking feature of the pavilion is its door-covered facade. The architects sourced 180 doors from houses being renovated in the heart of Paris, and arranged them in a parquet-like, herringbone pattern.

Other recycled materials include insulation from a dismantled supermarket roof, plexiglass mistakenly ordered by the city hall, plywood boards previously used in an exhibition, and oak battens left over from an office construction. Previously used chairs have been repaired and painted. Lights were previously used in a government building.

The pavilion was installed in front of City Hall of Paris. It will be dismantled and moved to Paris's 14th arrondissement, where it will be used as a sports clubhouse.