Oelinghausen Convent was founded only a few years after Wedinghausen. Initially, it was a double monastery with masculine and feminine branches - not such a rare phenomenon in the Middle Ages. But starting from the XIII century it became only Oelinghausen Convent. At the beginning of the XIX century, the monastery was dissolved. But now Oelinghausen is again used for its intended purpose: Sisters of the Order of Mary Magdalene live there. The doors of the monastery are open to tourists.
The XIII century wooden figure of Madonna, which is also called "Cologne Madonna" or "Queen of Sauerland", is the main treasure of the monastery. According to legend, Archbishop of Cologne Engelbert von Berg, whose sister was a nun here, gave it to the monastery. For centuries, the Madonna attracts many pilgrims to the monastery. The baroque altar with figures of saints, the fresco of St. Christopher, the nuns gallery and the unique organ are noteworthy among other decorations.