Christmas message of the Holy Year 1950, Pius XII presented the preliminary results, which deemed it likely that the tomb of Saint Peter was resting below the Papal altar of the Basilica. Not all questions were solved, and Kaas continued excavations after 1950, despite an emerging illness. Ludwig Kaas died in Rome in 1952, aged 70. He was first buried in the cemetery of Campo Santo in the Vatican. Later, Pope Pius XII ordered the body of his friend to be put to rest in the crypt of St. Peter's Basilica. Ludwig Kaas is thus the only monsignor who rests in the vicinity of virtually all popes of the twentieth century. To succeed him in his work, Pope Pius XII appointed a woman, Professor Margherita Guarducci, another Vatican novelty. List of publications Ludwig Kaas was a scholar and prolific writer, addressing a wide range of issues in Latin or German concerning marital law, education reform, moral and systematic theology, canon law, prisoners of war, the speeches of Eugenio Pacelli, historical issues, policy issues of the Weimar Republic and the Reichskonkordat. Some of his writings were published after his death. References Sources Halecki, Oscar. Pius XII, New York (1951). Kaas, Ludwig. Eugenio Pacelli, Erster Apostolischer Nuntius beim Deutschen Reich, Gesammelte Reden, Buchverlag Germania, Berlin (1930). Lehnert, Pascalina . Ich durfte ihm dienen. Erinnerungen an Papst Pius XII. Naumann, Würzburg (1986). Proces Verbal de la 1. conference, Lettres de Pie XII aux Eveques Allemands, Vatican City (1967). Proces Verbal de la 2. conference, Lettres de Pie XII aux Eveques Allemands, Vatican City (1967), p. 424–425. Scholder, Klaus. Die Kirchen und das Dritte Reich. Ullstein (1986). Tardini, Domenico Cardinale. Pio XII, Tipografia Poliglotta Vaticana (1960). Volk, Ludwig. Das Reichskonkordat vom 20.7.1933. Mainz (1972). External links 1881 births 1952 deaths People from Trier People from the Rhine Province Centre Party (Germany) politicians Members of the Weimar National Assembly Members of the Reichstag of the Weimar Republic History of Catholicism in Germany Pope Pius XII advisers Rhenish nationalism 20th-century German Roman Catholic priests