The Louvre has always showcased nudes - but never quite like this.
Police in Paris said they arrested six women today for baring their breasts and more outside the pyramid-shaped entrance to the museum in front of dumbstruck, applauding tourists. They were released after identity checks.
Protest organiser Safia Lebdi said the demonstration was connected to International Women's Day.
She said the women waved flags of Tunisia, Algeria, Egypt and Iran to highlight the many legal and cultural restrictions imposed on women in the Muslim world.
One of the naked protesters, Amina Sboui, is a former member of a Paris-based exhibitionist group called Femen renowned for its topless protests.
Last year Ms Sboui spent more than two months in jail in Tunisia for allegedly desecrating a cemetery by writing "Femen" on a wall.