The Belarusian Greek Catholic Church (Belarusian: Беларуская грэка-каталіцкая царква, BHKC), sometimes called, in reference to its Byzantine Rite, the Belarusian Byzantine Catholic Church, is the heir within Belarus of the Union of Brest. It is listed in the Annuario Pontificio as a sui iuris Church, an Eastern rite particular Church in full union with the Roman Catholic Church.