You can find out about the history of Witten when you stop by Marienkirche. You can attend a sporting event while in the area.
Though Marien Hospital Witten might be what brings you to town, perhaps you'll have a chance to explore more of Witten while you are here.
Rich with history, LWL Industrial Museum Zeche Nachtigall is a cultural attraction worth visiting in Bommern. You can attend a sporting event while in the area.