The church in Siedlec is Eclectic in style and dates back to 1911-13. The temple, designed by Stefan Karwatka, was built in Pseudo-Baroque style. The parish in Siedlec, which belongs to the Deanery of Zbąszyń in the Archdiocese of Poznań, has existed since the 13th Century. In the church cemetery, you can see several tombs of the insurgents from the Greater Poland uprising.