Apostolic King
From Wikipedia, the free encyclopedia
Apostolic King was an hereditary title borne by the King of Hungary. Saint Stephen (c.975-1038) is supposed to have received it from Pope Sylvester II: his efforts to Christianize his people led to his comparison to one of the apostles. It was first used by the Holy Roman Emperor Leopold I (1657-1705) as King of Hungary. The title was last used in the reign of Károly IV (1916-1918).
The introduction of this title is a parallel with Spain's Most Catholic and France's Most Christian King.