France.

Nuit Blanche, City of Paris

Mirror ball, 1000 mirrors, 7.5 meters in diameter.
The spectacular view of the starry sky has long been a source of delight and curiosity, but the abundance of artificial light in urban areas produces a glow that covers the stars in the firmament. The largest mirror ball ever made was suspended from a construction crane 50 meters above the ground to render the starry sky to the citizens of Paris for one night in the Jardin du Luxembourg during the Nuit Blanche event.