(French humorist and TV host Virginie Merle (C), also known as “Frigide Barjot” demonstrates against the gay marriage, adoption and procreation assistance in Paris, January 13, 2013. The women with her wear hats from the French Revolution. REUTERS/Benoit Tessier )

Several hundred thousand people massed at the Eiffel Tower in Paris on Sunday to protest against President Francois Hollande’s plan to legalize gay marriage and adoption by June.

Three columns of protesters, waving pink and blue flags showing a father, mother and two children, converged on the landmark from different meeting points in Paris. Many came after long train and bus rides from the provinces.

Champ de Mars park at the Eiffel Tower was packed, but turnout estimates varied widely. Organisers claimed 800,000 had protested, while police put the number at 340,000, high even in protest-prone France.

Hollande has pledged to push through the law with his Socialists’ parliamentary majority but the opponents’ campaign has dented public support and forced deputies to put off a plan to allow lesbian couples access to artificial insemination.