Giovanni Mariani (17 June 1919 – 23 January 1991) was an Italian prelate of the Catholic Church who spent his career in the diplomatic service of the Holy See.
Giovanni Mariani was born on 17 June 1919 in Santo Stefano d'Aveto, Province of Genoa, Italy.
[1] On 16 October 1967, Pope Paul VI gave him the general responsibilities of Apostolic Delegate to Western Africa, and then added a series of more specific assignments, beginning by naming him titular archbishop of Missua and Apostolic Pro-Nuncio to Senegal on 19 October.
[2] Cardinal Secretary of State Amleto Giovanni Cicognani consecrated him a bishop on 3 December.
On 25 April 1980, Pope John Paul II appointed him Apostolic Nuncio to Greece.