About 340,000 people converged on the Eiffel Tower in Paris on Sunday to protest a proposed gay marriage law, CBN News reports. President Francois Hollande is planning to legalize same-sex marriage, but many of the country's Catholic bishops and other religious leaders are fighting the initiative. Public opinion appears to be moving in their favor -- a recent poll shows about 50 percent of French citizens support gay marriage, down from 65 percent in August. France has already legalized civil unions for same-sex couples, but the new law would give gay couples the right to adopt. Those in support of traditional values insist children should be raised by a mother and a father.