Advisor To The Nuncio Pacelli
In 1920 Eugenio Pacelli, the Papal Nuncio to Bavaria and future pope, was also appointed Nuncio to Germany. In view of this new position, he asked Cardinal Adolf Bertram of Breslau, to provide him with experts who might serve as a link between the Nuncio in Munich and the Prussian bishops. Bertram suggested Kaas, who in his academic work had developed a special interest in the relations between the state and the Catholic Church.
The workload as a professor, a parliamentarian and as advisor to the Nuncio strained Kaas's energies. Though Kaas tried to convince himself that his primary obligation was to his own diocese, it was his academic post that always came out last. In 1922 he was prepared to resign his chair, but Bertram and Pacelli insisted that he should stay until he had obtained a secure position within the diocese that would not hinder his external commitments. Bertram, following Pacelli's wishes, proposed to the new bishop of Trier, Franz Rudolf Bornewasser, to make Kaas a cathedral canon, but the bishop refused. An angry Kaas announced he would give up all his other commitments and concentrate on his academic work, but eventually he was reconciled to Bornewasser. On 1 April 1924, Kaas was appointed to the Cathedral chapter.
Bishop Bornewasser had allowed Kaas to keep his parliamentary seat until September 1924, but expected him to resign it afterwards and concentrate on his administrative and academic work within the diocese. However, as Pacelli asked the bishop not to insist on this as it would "substantially hinder the hitherto influential work of Dr. Kaas and damage an effective representation of ecclesiastical interests in a deplorable way". Bornewasser, though legally in a stronger position, yielded to these considerations of expediency and did not press his demand again. In the same year, Kaas resigned from his academic chair.
Pascalina Lehnert, writing after Pacelli had already become Pope Pius XII, described the relationship between Kaas and Pacelli in the following words:
Talent, vision, and an excellent knowledge of the situation made Kaas a great advisor and incalculable helper. He was a fast learner, a hard and reliable worker with good judgement. The Nuncio, Cardinal and Holy Father appreciated him very much. Again and again I heard the highest praises from Pope Pius XII. The Monsignore knew, that the Holy Father had special esteem for him and he told me how much this knowledge fulfils him.
In 1925, as Pacelli was also appointed Nuncio to Prussia and moved his office to Berlin, the cooperation between Pacelli and Kaas became even closer. Out of this involvement grew a formal but close and lasting friendship, which remained one of the basic factors throughout Kaas's life. In this position Kaas contributed to the successful conclusion of the Prussian Concordat negotiations with Prussia in 1929.
After this achievement, Pacelli was called back to the Vatican to be appointed Cardinal Secretary of State. Pacelli asked Kaas, who had accompanied him on his travel, to stay in Rome but Kaas declined because of his ecclesiastical and political duties in Germany. Nonetheless, Kaas would frequently travel to Rome, where he would stay with Pacelli, and experience first hand the conclusion of the Lateran Treaty, which he penned an article on. In 1931 and 1932 continued as an advisor in negotiations for a Reichskonkordat; that, however, came to nothing.
In 1929, Kaas published a volume of Nuncio Pacelli's speeches. In the introduction, he described him as: “Angelus not nuntius, ... his impressive personality, his sacerdotal words, the popularity he generated in public meetings"
Read more about this topic: Ludwig Kaas