Dozens of demonstrations have been developing around the world in the wake of Wednesday’s massacre in Paris at the offices of the satirical newspaper Charlie Hebdo, where masked gunmen murdered 12 and injured 10 others. French newspaper Le Monde is tracking the growing number of rallies, including those in Berlin, London, New York, and Montreal.

In Paris on Wednesday evening, a crowd reportedly numbering in the thousands gathered at Place de la Republique, rallying in solidarity around the phrase “Je Suis Charlie,” or “I am Charlie.” Some raised pens in tribute to the slain cartoonists.

There was also a stirring tribute from the entire newsroom of Agence France-Presse on Wednesday: