That November, he did not attend the consistory for new cardinals, rather meeting with them and Francis at his residence afterward. Following the death of Cardinal Paulo Evaristo Arns in December 2016, Benedict became the last living person appointed cardinal by Pope Paul VI. In June 2017, Benedict received newly created cardinals in his chapel and spoke with each of them in their native language. In July 2017, he sent a message through his private secretary for the funeral of Cardinal Joachim Meisner, who had suddenly died while on vacation in Germany. In November 2017, images emerged on the Facebook page of the Bishop of Passau, Stefan Oster, of Benedict with a black eye; the bishop and author Peter Seewald visited the former pope on 26 October since the pair were presenting Benedict with the new book Benedict XVI – The German Pope which the Passau diocese created. The former pope suffered the hematoma earlier after having slipped. In late 2019, Benedict collaborated on a book expressing that the Catholic Church must maintain its discipline of clerical celibacy, in light of ongoing debate on the issue, though later requested his name to be removed from the book as co-author. In June 2020, Benedict visited his dying brother Georg in Germany for the last time. Georg died on 1 July, aged 96. On 3 August 2020, Benedict's aides disclosed that he had an inflammation of the trigeminal nerve. On 2 December of the same year, Maltese cardinal Mario Grech announced to Vatican News that Benedict had difficulty speaking and that he had told the new cardinals after the consistory that "the Lord has taken away my speech in order to let me appreciate silence". Benedict became the longest-lived pope on 4 September 2020 at 93 years, 4 months, 16 days, surpassing the age of Pope Leo XIII. In January 2021, Benedict and Francis each received doses of a COVID-19 vaccine. On 29 June 2021, the pope emeritus celebrated his platinum jubilee (70th anniversary) as a priest. Following the consistory of 27 August 2022, Francis and the newly created cardinals paid a brief visit to Benedict at Mater Ecclesiae Monastery. Death and funeral Worsening health and death On 28 December 2022, Pope Francis said at the end of his audience that Benedict was "very sick" and asked God to "comfort him and support him in this testimony of love for the Church