pax ecclesiae
/ˌpaks ɪˈkliːzɪiː/noun
A state or declaration of peace overseen by the Church; peace between factions of the Church.
Origin
Late 19th century; earliest use found in English Historical Review. From post-classical Latin pax ecclesiae the peace of the Church (3rd cent.; compare pax ecclesiastica (3rd cent.)) from classical Latin pāx peace + post-classical Latin ecclesiae, genitive of ecclesia church.