Paris waived its ban on drones Sunday as tech fans gathered in the French capital to celebrate the gadgets and promote their potential uses.
Experts explained how the flying robots work to visitors at the iconic Champs-Elysees boulevard.
There was a high security presence at the event due to France's current state of emergency, which was put in place in response to a deadly terrorist attack in November 2015 and has been extended repeatedly amid ongoing security threats.
Organizers of the Paris Drone Festival were keen to demonstrate a wide range of uses for drones, which have come under fire over security fears and a lack of regulation as they become increasingly popular both with businesses and for recreation.
"They can be used in many areas: on the train, by the fire brigade, to protect historical buildings and in agriculture," Jean-Louis Missika, a city politician responsible for innovation and development, told dpa.
In a display of the devices' potential at a similar event in Berlin on Sunday, onlookers were treated to sausages delivered by drones at a "Flying BBQ."