The St. Cäcilia Irmgarteichen is a Catholic church in the Irmgarteichen district of the city of Netphen and is one of the oldest churches in the Siegerland. In 1325 the chapel of St. Cecilia was first mentioned in a document. It is referred to in the Siegen document book as "capella subjecta", as a chapel dependent on Netphen. In 1339 the local clergyman was still called "viceplebanus", a clergyman who was dependent on an ordinary pastor. But already in 1349 St. Cäcilia appeared on an equal footing with the other parish churches in the country and even had its own parish seal.
In 1725 the church built by the von Bicken family was enlarged. In 1932 a new church was built, only the old tower, which was built around 1725, was included in the new building. This is now a listed building. When the Cäciliakirche in Irmgarteichen was rebuilt in 1932, some works of art were given away. The church in Hainchen got u. a. a Pietà from the 17th century, the church in Salchendorf got a Gothic statue of St. Nicholas made of wood. In 1995 the interior of the church was extensively renovated.