The 6th César Awards ceremony, presented by the Académie des Arts et Techniques du Cinéma, honoured the best French films of 1980 and took place on 31 January 1981 at the Palais des Congrès in Paris.
 The ceremony was chaired by Yves Montand and hosted by Pierre Tchernia. "
The Last Metro" won the award for Best Film.
The 30th César Awards ceremony, presented by the Académie des Arts et Techniques du Cinéma, honoured the best films of 2004 in France and took place on 26 February 2005 at the Théâtre du Châtelet in Paris.
 The ceremony was chaired by Isabelle Adjani and hosted by Gad Elmaleh. "
Games of Love and Chance" won the award for Best Film.
The 7th César Awards ceremony, presented by the Académie des Arts et Techniques du Cinéma, honoured the best French films of 1981 and took place on 27 February 1982 at the Salle Pleyel in Paris.
 The ceremony was chaired by Orson Welles and hosted by Pierre Tchernia and Jacques Martin. "
Quest for Fire" won the award for Best Film.
The 5th César Awards ceremony, presented by the Académie des Arts et Techniques du Cinéma, honoured the best French films of 1979 and took place on 2 February 1980 at the Salle Pleyel in Paris.
 The ceremony was chaired by Jean Marais and hosted by Pierre Tchernia and Peter Ustinov. "
Tess" won the award for Best Film.
The 37th César Awards ceremony, presented by the French Academy of Cinema Arts and Techniques (Académie des Arts et Techniques du Cinéma), was held on 24 February 2012, at the Théâtre du Châtelet in Paris.
 The awards honoured the best films of 2011. "
The Artist" won six out of its ten nominations, including Best Film, Best Director (Michel Hazanavicius), Best Actress (Bérénice Bejo), and Best Cinematography (Guillaume Schiffman).
 The ceremony was chaired by Guillaume Canet, with Antoine de Caunes as master of ceremonies.
 Nominations were announced 27 January 2012.
The 29th César Awards ceremony, presented by the Académie des Arts et Techniques du Cinéma, honoured the best films of 2003 in France and took place on 21 February 2004 at the Théâtre du Châtelet in Paris.
 The ceremony was chaired by Fanny Ardant and hosted by Gad Elmaleh. "
The Barbarian Invasions" won the award for Best Film.
The 4th César Awards ceremony, presented by the Académie des Arts et Techniques du Cinéma, honoured the best French films of 1978 and took place on 3 February 1979 at the Salle Pleyel in Paris.
 The ceremony was chaired by Charles Vanel and hosted by Pierre Tchernia and Jean-Claude Brialy. "
L'Argent des autres" won the award for Best Film.
The 34th César Awards ceremony was presented by the Académie des Arts et Techniques du Cinéma to honour its selection of the best films of 2008 on 27 February 2009.
 Canal+ broadcast the event, which took place again at Théâtre du Châtelet in Paris, France.
 The nominations for the Awards were announced on 23 January.
 The ceremony was chaired by Charlotte Gainsbourg and hosted by Antoine de Caunes. "
Séraphine" won the award for Best Film.
Amélie (also known as Le fabuleux destin d'Amélie Poulain; ] ; English: "The Fabulous Destiny of Amélie Poulain" ) is a 2001 French romantic comedy film directed by Jean-Pierre Jeunet.
 Written by Jeunet with Guillaume Laurant, the film is a whimsical depiction of contemporary Parisian life, set in Montmartre.
 It tells the story of a shy waitress, played by Audrey Tautou, who decides to change the lives of those around her for the better, while struggling with her own isolation.
 The film was a co-production between companies in France and Germany.
 Taking in over $33 million in a limited theatrical release, it is to date the highest-grossing French-language film released in the United States, and one of the biggest international successes for a French movie.
The 27th César Awards ceremony, presented by the Académie des Arts et Techniques du Cinéma, honoured the best films of 2001 in France and took place on 2 March 2002 at the Théâtre du Châtelet in Paris.
 The ceremony was chaired by Nathalie Baye and hosted by Édouard Baer. "
Amélie" won the award for Best Film.

Question: Who chaired the 27th César Awards ceremony in which a film written by Jeunet with Guillaume Laurant won the award for the Best Film?
Answer: Nathalie Baye