Cause of death: cancer
Pierre Joseph Auguste Messmer (French pronunciation: [pjɛʁ mɛsmɛʁ]; 20 March 1916 – 29 August 2007) was a French Gaullist politician. He served as Minister of Armies under Charles de Gaulle from 1960 to 1969 – the longest serving since Étienne François, duc de Choiseul under Louis XV – and then as Prime Minister under Georges Pompidou from 1972 to 1974. A member of the French Foreign Legion, he was considered one of the historical Gaullists, and died aged 91 in the military hospital of the Val-de-Grâce in August 2007. He was elected a member of the Académie française in 1999; his seat was taken over by Simone Veil.
Source : Wikipedia
