The bishop Áron Márton had relations with each Greek-Catholic Romanian cardinal – dr. Iuliu Hossu (1885-1970), dr. Alexandru Todea (1912-1994), Lucian Mureşan (n. 1931) – mostly before they were invested as cardinals. During their lifetimes, and perhaps also in their later development, an important role played the political regime which sought the dissolution of the Greek-Catholic Church, out of some nationalist reasons. During the Communist regimes, they remained faithful to the Church, being symbols and actors of the resistance against the destroying powers and protectors of the priests and believers. Although it could seem strange, in their church activity, the cardinals found support in Áron Márton, the Roman-Catholic bishop of Alba Iulia.