Ostinghausen is characterized by the Catholic parish of St. Christophorus with its distinctive church tower, which can be seen from afar. Today's parish hall is a former farmstead. Significant to the parish is the Ida relic, which was given to the parish in 1862. The original church building was demolished in 1895 and replaced by a new church by 1896, which was consecrated by Bishop Dr. Hubertus Simar. Significant is the single-nave, neo-Gothic building with the Romanesque baptismal font, the predecessor church.
Due to striking similarities with the St. Ida Basilica in Herzfeld, the Catholic parish church of St. Christophorus is often referred to as a sister of the latter.
Regular service times: Wednesdays, 6:00 p.m.