Mária Molnár, born in 1886, was the most notable Hungarian missionary of the Reformed Church in Hungary, and was the only Hungarian missionary who undertook a mission between the two World Wars. Molnár used the knowledge she acquired as a voluntary nurse during World War I in her mission work on the Manus and Pityilu Islands of the Admiralty Islands, ultimately becoming a martyr of the Reformed Church in Hungary during the Pacific theater of World War II.
In October 2023, Bishop Zoltán Balog, Ministerial President of the Synod, visited Australia and Papua New Guinea together with a delegation of the President of Hungary, Katalin Novák.