Paris stopped to remember the victims of three days of violence in January 2015 that started with the attacks on the offices of the satirical magazine Charlie Hebdo.
French President Francois Hollande and Paris Mayor Anne Hidalgo first unveiled a plaque to a police officer who was shot on January 7 on the street near the office of satirical magazine Charlie Hebdo.
They then moved on to the office, where they unveiled another plaque containing the names of the people killed in the attack there.
Hollande and Hidalgo then headed to the east of Paris, where they presented a commemorative plaque for the four victims in a kosher supermarket.
The January attacks resulted in 17 deaths and are seen as the precursor for another spate of attacks in November that left 130 dead in downtown Paris.
Another memorial ceremony is planned for Saturday in Montrouge near Paris, where a police officer was shot.
A special edition of Charlie Hebdo containing works from cartoonists murdered last January is set for release Wednesday.