protopope
/ˈprəʊtə(ʊ)pəʊp/(also protopop)
noun
In the Orthodox and Eastern Catholic Churches: a senior priest; an archpriest.
Origin
Late 16th century; earliest use found in Giles Fletcher. From Old Russian protopop″ from Byzantine Greek πρωτοπαπᾶς. Compare French protopope, German Protopop.