Noun
archconfraternity (plural archconfraternities)
(Roman Catholicism) A religious confraternity that, as a special concession of the Holy See, can join or affiliate with, and extend privileges to, other similar brotherhoods.
His estate was valued at 30,000 scudi and it was bequeathed to the Archconfraternity of the Annunciation to use as dowries for poor young girls. Source: Internet