In the right side chapel of the church of the Campo Santo Teutonico stood a classicist Marian altar. It was a so-called privileged altar, which the rector Anton de Waal consecrated to the Regina Pacis, the Queen of Peace, on 2 July 1915, in the middle of the First World War. He had promised Pope Benedict XV to say Mass there every day until peace returned (Päpstlichkeit und Patriotimus, p. 790). It was at this altar that Hubert Jedin and the Irish hero Hugh O'Flaherty said Mass early every morning during the Second World War and then had breakfast to discuss war and peace..