The book "Maria - Ecclesia" by Gisbert Greshake offers an in-depth theological examination of the figure of Mary and her significance for humanity and the Church. The internationally recognized theologian investigates whether there are new insights about Mary from a theological perspective. Through a comprehensive analysis of scripture and tradition, Greshake highlights the unique characteristics of Mary and their relevance for understanding humanity, creation, and interreligious dialogue. He also addresses the current challenges within the Church and provides critical comments as well as suggestions for necessary reforms in church teachings and structures. This well-founded engagement with a "mariologically grounded theology" opens new perspectives and encourages reflection on the role of Mary in today's world.