20th-century French judges

Serge Fuster (pen name "Casamayor"; 28 November 1911 in Algiers, French Algeria – 29 October 1988 in Paris ) was a French judge and writer. He wrote over twenty books, primarily essays on justice.
During World War II, in 1940, Fuster was a lieutenant in Sedan. When the war ended, Fuster participated in the Nuremberg Trials, as part of the French delegation, led by Edgar Faure and François de Menthon.
Beginning in the 1950s Fuster began writing for the journal Esprit under the nom-de-plume of "Casamayor", a name he would use for the next thirty years.
Fuster ended his judicial career as President of the Chamber at the Court of Appeal of Versailles. Upon his death, he was given many tributes, including ones by President François Mitterrand, Prime Minister Michel Rocard, and Justice Pierre Arpaillange.

Renaud van Ruymbeke (born 19 August 1952) is an investigative magistrate, well known for specializing in political and financial corruption cases. He investigated the French-Taiwan Frigates Affair, which was related to the Clearstream, and the Urba Affair.

Thierry Jean-Pierre (1955–2005) was a French judge and Member of the European Parliament (MEP).

Bruno Cotte (born 10 June 1945 in Lyon) is a French judge of the International Criminal Court. Prior to his appointment to the ICC Cotte was a member of the Cour de Cassation, France's supreme court of appeal. He had been Director for Criminal Affairs and Pardons in the French Ministry of Justice, Attorney General of the Versailles Court of Appeal and a public prosecutor of the Paris district court. He was elected to the ICC in 2008 to fill a judicial vacancy and was elected from the Western European and Others group of states. He is a member of the List A of judges, the list comprising those judges who are experts in criminal law.

Jean-Paul Costa (3 November 1941 – 27 April 2023) was a French jurist and was the President of the European Court of Human Rights from 19 January 2007 until his term at the Court ended on 3 November 2011. He was first appointed a judge of the Court on 1 November 1998, and in 2009 was elected to serve an additional three years as President.

Jean Chamant (23 November 1913 – 22 December 2010) was a French politician, judge and senator who served from 1977 to 1995.

Pierre Mazeaud (French pronunciation: [pjɛʁ mazo]; born 24 August 1929) is a French jurist, politician and alpinist.
In February 2004, he was appointed president of the Constitutional Council of France by President of France Jacques Chirac, replacing Yves Guéna, until he was succeeded by Jean-Louis Debré in February 2007. He had been a member of the council since February 1998.Pierre Mazeaud has a doctorate in law from the University of Paris (on marriage and the condition of the married woman in ancient Rome).
From 1961 to 1964, he was a member of the judiciary. In 1976, he became a counsellor in the Council of State, a position from which he retired on 25 August 1995. During the 1970s, he held subordinate governmental positions regarding sports. As a university student, Mazeaud was an active member of the Anarchist Federation. In the 1960's he entered electoral politics as a Gaullist.
Pierre Mazeaud's main hobby is alpinism, which he practiced at high level. On 11 July 1961, Mazeaud and other fellow climbers almost died in the Mont Blanc massif due to an unexpected storm.On 15 October 1978 he became the first Frenchman to climb Mount Everest together with Jean Afanassieff, Nicolas Jaeger and Kurt Diemberger (from Austria).

Éric Halphen (born 10 October 1959) is a French judge best known as the investigating magistrate in the Parisian low-cost housing scandals of the 1990s.