Mary of the Divine Heart was a German nun born Maria Droste zu Vischering in 1863. Coming from a noble family in Münster, she joined the Good Shepherd Sisters in 1888. She eventually served as Mother Superior in Porto, Portugal, where she lived until her death in 1899. She is primarily recognized for her spiritual influence on Pope Leo XIII, which led to the official consecration of the entire world to the Sacred Heart of Jesus.