The church dedicated to St. Casimir has been the parish church in Świnice Warckie for more than 700 years. It has a very rich history. Helena Kowalska, later known in the convent as St. Sister Faustina, was baptized in this church. Here she went to her first confession and first Holy Communion, and attended the Sunday Eucharist and other services and devotions. For this reason, many pilgrims both from Poland and other countries in the world, wishing to visit places associated with the life of the Apostle of The Divine Mercy, make their way to the parish church in Świnice Warckie. On 25th September 2002, Bishop Bronisław Dembowski, the Ordinary of Włocławek, raised the parish church to the rank of Diocesan Shrine of the Baptism and Birth of St. Sister Faustina. The main indulgenced celebration takes place on Sunday around 25th August each year (the birthday of the Apostle of The Divine Mercy).