Perforated metal staircase in Paris apartment

From slender steel treads to bold graphic displays, these seven projects demonstrate the diverse possibilities of stairway design.

A laser cutter or water-jet cutter can add a whimsical, decorative flourish to virtually any space. Here, from Dwell's archives, are seven creative uses of perforated metal.

An American architect in Paris experiments with Corbusian perceptions of interior and exterior space.