Pope Francis will kick of the symposium with a conference on “Faith and priesthood today.”
The first time a pope met with victims of sex abuse was in 2008, in Washington, D.C.
The archbishop of the German archdiocese was highly critical of the Church's handling of sex abuse cases.
The cardinal's lawyers insist there are flaws in the proceedings, and say they cannot prepare a defense because they don't have access to all of the evidence.