Parisians and tourists wearing all-white outfits enjoyed gourmet picnics in front of the French capital's 19th century Les Invalides monument, a meal heightened by a preceding mystery.
The location of the 30th anniversary staging of the international dining event known as Diner en Blanc, or Dinner in White, was revealed to eaters in a series of text messages only at the last minute.
People gathered on lawns with views of the gold-domed building that houses the tomb of Napoleon Bonaparte and other prominent French figures.
They brought tables with white tablecloths and sipped champagne and wine.
Organizers expected 20,000 to 30,000 diners, one-third of them from outside France. The Champs-Elysees avenue, the Louvre museum and the Eiffel Tower are among past sites. Francois Pasquier, who launched the event in Paris in 1988, said more than two dozen orchestras entertained guests.
Last year, more than 110,000 people in 28 countries took part in Dinner in White events.