noun
concordat
A formal agreement between the Vatican and a sovereign state, regulating church-state relations. Used in historical and political contexts.
from German Konkordat
ナポレオンは1801年にローマ教皇とコンコルダートを結んだ。
Napoleon concluded a concordat with the Pope in 1801.
A general term for a treaty or agreement, not specific to church-state relations.
Borrowed from German 'Konkordat', ultimately from Latin 'concordatum'.