Gunmen on Wednesday stormed the Paris headquarters of satirical magazine Charlie Hebdo, killing 12 people, including Charlie Hebdo's editor-in-chief, Stéphane Charbonnier.

As the gunmen stormed the building, they shouted "We have avenged the prophet" and "Allahu Akbar," leading many to the conclusion that the attacks were a retaliation against the magazine's long history of provoking Muslims and other groups with controversial magazine covers.

We've collected a number of the magazine's most notable and most controversial covers.