French President Francois Hollande and his cabinet, all dressed in black, bowed their heads at the Sorbonne University.
Scores of students surrounded them.
Most of the victims of Friday night's attacks in Paris were under the age of 40. Many were students.
At Place de la Republique, near the site of many of Friday's attacks, hundreds of people observed a minute of silence. As well, some city schools and organizations came together to pay tribute to those who died or suffered injuries.
The victims represent a wide-cross section of French society and include a camera technician who worked for RFI's sister station, France 24. Matthieu Hoche was killed at the Bataclan concert hall, along with at least 88 others inside or around the venue at the time of an Eagles of Death Metal concert. On Monday at noon, many people observed a minute of silence outside the Bataclan as well.
Other identified victims include a lawyer with the Paris office of the international law firm Hogan Lovells, an international product manager for Mercury Music Group and a cousin of French midfielder Lassana Diarra, who played against Germany in Friday's soccer match at the Stade de France, during which three suicide bombers blew themselves up outside the stadium.
Hundreds of people have been hospitalized. It is believed dozens of survivors remain in critical condition.