Eugène-Gabriel-Gervais-Laurent Tisserant[1] (pronounced [øʒɛn ɡabʁijɛl ʒɛʁvɛ loʁɑ̃ tisʁɑ̃]; 24 March 1884 – 21 February 1972) was a French prelate and cardinal of the Catholic Church.

Tisserant served as a professor at the Pontifical Roman Athenaeum S. Apollinare and curator at the Vatican Library from 1908 to 1914, at which time he became an intelligence officer in the French Army during World War I.

In the consistory of 15 June 1936, Tisserant was created Cardinal Deacon by Pope Pius XI, assigned as his titular church the Basilica of Santi Vito, Modesto e Crescenzia.

he received his consecration on the following 25 July from Cardinal Eugenio Pacelli (later Pope Pius XII), with Archbishop Giuseppe Migone and Bishop Charles-Joseph-Eugène Ruch serving as co-consecrators, in St. Peter's Basilica.

[3] In 1939, Tisserant urged Pius XII to promulgate an encyclical "on the duty of Catholics to resist the unjust orders of an authoritarian state.

"[4] After the outbreak of World War II, Pius XII refused to release Tisserant as the head of the Vatican Library, preventing him from returning to France to serve in the army.

In 1969, he demanded a retraction from Cardinal Leo Joseph Suenens, Archbishop of Brussels-Mechelen, for the "defamatory and slanderous" statements that he allegedly made against the bureaucracy of the Roman Curia.