On August 23, 2004, they discovered a cinema 60 feet beneath Paris. The sun was shining on the Trocadéro, the Eiffel Tower gleamed across the Seine, and deep belowground, police came across a sign. The officers were on a training mission, exploring the 4.3 miles of catacombs that twist beneath the 16 th arrondissement. The former quarries are centuries-old, illegal to enter, and the sign at the mouth of the tunnel read, “No public entry.” Police are not the public; they entered. … They found 3,000 square feet of subterranean galleries, strung with lights, wired for phones, live with pirated electricity. The officers uncovered a bar, lounge, workshop, dining corner and small screening area. The cinema’s seats had been carved into the stone itself, with room for 20 people to sit in the cool and chomp on popcorn.