Münster is close to the Netherlands.
“In the entrance area (southwest transept) is a statue of St. Barbara which is not very prominently displayed. She holds a round tower with three windows in her hands. The legend has it that the saint was locked in a tower by her father to keep her from marriage and Christian influence. Because of the cramped nature of the tower and its stairway, she is now patron saint of miners – the cramped tower symbolizes the way through the narrow door of death to eternal life.” Quote from Wikipedia
https://en.wikipedia.org/wiki/M%C3%BCnster_Cathedral