concordat
noun [ C ] religion specialized uk/kənˈkɔː.dæt/ us/kənˈkɔːr.dæt/
（天主教与某一国家的）政教协定
a formal agreement, especially on religious matters, between the Roman Catholic Church and a particular country, or a meeting at which such an agreement is made
Synonyms: accord agreement (SAME OPINION)compact (AGREEMENT) covenant pacttreaty