After forty-two years as priest, spelunker, and grotto builder extraordinaire, Father Dobberstein passed the torch to Szerensce and Greving. Though he fully believed in the radiating spiritual power of his work, he may never have imagined the magnitude of his influence.

Matt Szerensce continued to work on the Grotto until his retirement in 1959.

Father Dobberstein often told Father Greving "the show must go on". For 50 years Father Louis Greving continued to build and care for the Grotto with the tender hands of a loving Father. Father Greving is quoted in the book "An Explanation of the Grotto of the Redemption", saying "By providence of God I spent my priesthood of some 45 years (since 1946) in the shadow of the Grotto of the Redemption. The Grotto is a monument of faith, hope and love that once lived in the mind and heart of Father Paul Dobberstein". Over some 42 years he labored laboriously and perseveringly to give external expression of that faith and love in a structure which is now the Grotto of the Redemption-an artistic portrayal of the life of Christ in stone.

Some 100,000 tourist come to see the Grotto annually. As Father Dobberstein's successor Father Greving considered it a privilege to carry out his plan the best he could. Spending all except one year of his priesthood at the Grotto. Father Greving continued to build and care for this wonderful gift. But most of all welcomed the thousands of visitors each year. Father Greving celebrated 50 years as a priest in 1996. Having retired he continued an active life ministering to and caring for the many who came to know and love him. Fr. Greving departed this life and went to his heavenly reward Feb. 14, 2002. He is buried at West Bend Cemetery.