Other documents and events Open letter of Cardinal Koch to Professor Dr Volker Leppin [DE] (8 February 2021) Advocacy Statement on Situation of Migrants and Refugees in Europe (22 September 2020) Joint Declaration on the Doctrine of Justification | 20th Anniversary Edition (2019) Communiqué Consultation Notre Dame University (26-28 March 2019) Statement Consultation Notre Dame University (29 March 2019)