The Polish Catholic Bloc (Polish: Polski Blok Katolicki, PBK) was a Christian-democraticelectoral alliance in Poland.[1] Its full name was the Polish Catholic Bloc of the Polish People's Party "Piast" and Christian Democracy (Polish: Polski Blok Katolicki Polskiego Stronnictwa Ludowego „Piast” i Chrześcijańskiej Demokracji).[2]