The first idea to build a new church in Niepokalanów (or at least a large chapel), appeared before the
Second World War. Unfortunately, at that time, the Franciscans did not have adequate funds to start the building. Construction plans were prepared and approved in December 1938 in
Warsaw. An external company was hired for analysis of the land on which the church was to stand. In May 1939, there was blessed a cross on the square assigned for building the church. The outbreak of war in September 1939, stopped the work for a long time. Most of the materials collected for the construction were plundered by the Nazis in December 1939. After the war, in June 1948, the first brick was put for the building of a new church. The design was made by the architect Zygmunt Gawlik from
Cracow. Professional co-friars worked at decoration of the interior of the church: sculptors, stonemasons, blacksmiths and so on. Many of the sculptures were made by friar-artist Maurycy Kowalewski, with the help of friar Abel Dziełyński and the other friars. The church, devoted to the BVM the Immaculate, the Omni-mediatress of All Glories, could hold up to 3000 people. It was consecrated on 3 October 1954 by Bishop Wacław Majewski, who replaced the imprisoned cardinal
Stefan Wyszyński. A clock with five dials was installed on the church's bell tower. The four clock bells, which chime the quarters and the hours, were named:
Knight of the Immaculata, Maximilian, Francis and
Anthony. Beneath the presbytery there is a Chapel of Our Lady of Częstochowa, where has been set a Panorama (the Millennium History of the Church in Poland). Furthermore, two organs were installed in the basilica: a 16 pipe organ (in the presbytery) and another 49 pipe organ (in the choir loft), the work of Włodzimierz Truszczyński. == Architecture and specifications ==