Many of the participants held pencils in memory of those killed in the attack on the editorial office of Charlie Hebdo magazine. A huge banner was unfurled in downtown saying "Brussels is Charlie" in French, Flemish and English.
The march coincided with the largest march France has ever seen in response to the Charlie Hedbo. French top officials and dozens of world leaders took part in the event.
On January 7, 2 gunmen entered the offices of Charlie Hedbo and slaughtered 12, including two policemen. After three days, the gunman were killed, but ultimately, the violence left 17 people dead.