Given that the Eastern Catholic Churches could at times be a delicate topic for dialogue with the Orthodox, the Secretariat for Christian Unity decided that the subject of these communities would ...

while Catholic Christian priests believed in holy orders of celibacy. Another major point of theological contention was that Eastern Orthodox Churches (not to be confused with Eastern Rite ...

The Christian observance of Ash Wednesday ... as a sign of penance," according to Hallow, an app for Catholic prayer and meditation. Eastern Orthodox churches observe Lent or Great Lent.