Dozens of people stripped outside Facebook's New York office on Sunday as part of an art installation protesting a ban on nudity on Facebook and Instagram.

The protest was organized by the American artist and photographer Spencer Tunick and the National Coalition Against Censorship.

Artists say Facebook's nudity policy is preventing them from sharing their work online.

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Dozens of naked people gathered outside Facebook's office in New York on Sunday as part of an art installation protesting Facebook's ban on nudity.

The demonstration, known as #WeTheNipple, was organized by the National Coalition Against Censorship along with the American artist Spencer Tunick, who photographed the nude crowd.

Facebook has policies banning nudity on its platform and Instagram. Some artists say this prevents them from sharing their work online.

"It particularly harms artists whose work focuses on their own bodies, including queer and gender-nonconforming artists, and the bodies of those in their communities. Museums and galleries are constrained when even promoting exhibitions featuring nudes," the NCAC said in a press release for the event.

Facebook declined to comment on the event.

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According to CNN, members of Grab Them By The Ballot, a women's-empowerment group, also participated in the demonstration.

"We are here to empower women around body positivity and encourage female voter turnout in 2020," Dawn Robertson, a director of the group, said in a statement before the event.

She continued: "This isn't just about shock value and protesting — it's about reclaiming our bodies. Facebook and Instagram have missed this message entirely as they cling to negligent and blatantly misogynist policies that overlook the context of the artistic nudity being posted."

Robertson said Facebook banned the group's ad account after it posted a nude painting with a poem for Mother's Day. She said her own account had also been banned on several occasions.

Robertson said that after she appealed the bans Facebook apologized and said it was wrong, but that she had since been banned again.