Television images of the rally Saturday showed a packed outdoors crowd, with few wearing face masks.
Some of those potentially skeptical about a vaccine meanwhile turned out in numerous German cities and Poland's capital Warsaw on Saturday, protesting against anti-coronavirus measures and often defying mask-wearing rules.
The movement is made up of a number of different groups, from self-declared "free thinkers" to anti-vaccine campaigners, conspiracy theorists, and far-right activists.
France, UAE milestones
There are signs of a resurgence of the virus in numerous countries that lifted many coronavirus measures after beating back the first wave of infections months ago.
France reported 10,000 new infections on Saturday, the country's highest daily number since launching wide-scale testing.
The milestone came a day after Prime Minister Jean Castex declined to announce any new major restrictions despite a "clear worsening" in the country's outbreak.
"We have to succeed in living with this virus, without returning to the idea of a generalized lockdown," Castex said.
Another country to hit a daily milestone on Saturday was the United Arab Emirates, which recorded more than 1,000 new coronavirus cases for the first time.