This incomplete list of French ambassadors to the Holy See since the Middle Ages includes all regimes from the Kingdom of France to the current French Republic:
Ambassadors from the Kingdom of France
Officially recalled in 1791, Bernis was not replaced due to the French Revolution
Ambassadors 1789-1945
Rome was annexed to the French Empire between 1806-1814
Third Republic
1870-1871: Édouard Lefebvre de Béhaine, chargé d'affaires
1871-1873: Count Bernard d'Harcourt
1873-1876: Francisque de Corcelle (second appointment)
1876-1878: Georges Napoléon Baude
1878-1880: Joseph de Cadoine de Gabriac
1880-1882: Ferdinand Henry de Navenne
1882-1896: Édouard Lefebvre de Béhaine (was chargé d'affaires in 1870)
1896-1898: Eugène Poubelle
1899?-1904: Armand Nisard
Diplomatic relations were broken from 1904-1921 due to the French separation of Church and State
Vichy France
Ambassadors since 1945
Provisional Government
Fourth Republic
Fifth Republic
References
Africa Americas Asia Europe Organisations Former 1 No diplomatic relations with France, functions as an informal diplomatic mission
Lists of heads of the diplomatic missions of France
Ambassadors International organisations Former states