In 1967 members were involved in debates concerning religious freedom in the New Order and the influence of missionaries on the nation.

In 1923, Fredericus Soetrisno Harjadi, Ignatius Joseph Kasimo, and others formed the Javan Catholic Political Union (Javanese: Pakempalan Politik Katolik Djawi (PPKD)).

[4] In the political situation of the Dutch East Indies, PPKD joined itself with the Indische Katholieke Partij (IKP), a federation of Catholic organization in the Dutch East Indies, which was formed in November 1918.

The underground hiding ended in the beginning of July 1949 when the Indonesian government returned to Yogyakarta.

The congress also decided to unite all of the Catholic organizations in the United States of Indonesia at that time: All of the delegations from the organizations agreed to merge into the Catholic Party, which was finalized on 12 December 1949.

[8] Since 1949, Catholic party began to open its membership for non-pribumis, which was based on the decision about the citizenship system of Indonesia, which was established in the Round Table Conference.