But she said Trudon manufactures a few hundred thousand candles a year and that “sales have mainly accelerated over the past five years — multiplied by almost four — along with a strong international expansion.” It has a total of 87 workers, including those in its shops around the world.

To keep pace with demand, the manufacturing plant “is nearly doubling in size, from 2,400 square meters to 4,400,” or from 25,835 square feet to 47,360 square feet, Mr. Pruvost said one recent autumn morning as he pushed open the doors of the existing structure, which resembled an airplane hangar.

— Read more in A Company That Once Lit Louis XIV’s Chambers at The New York Times.