Context : Jean-Marie Villot (11 October 1905 -- 9 March 1979) was a French prelate and Cardinal of the Roman Catholic Church who served as Archbishop of Lyon from 1965 to 1967, Prefect of the Congregation for the Clergy from 1967 to 1969, Vatican Secretary of State from 1969 to 1979, and Camerlengo of the Holy Roman Church from 1970 to 1979. 
Answer : 9 March 1979
What was the date of death of Jean-Marie Villot?