Editing Pope Gregory XVI (section)

===Cardinal===
[[File:Grand Gala Berlin.jpg|thumb|right|200px|"The Grand Gala Berlin" is a luxury carriage constructed in Rome during the first half of the nineteenth century. It is the work of two pontiffs: [[Leo XII]], who called for it to be produced in 1824–1826, and Gregory XVI, who requested some important modifications.]]
On 21 March 1825, Cappellari was created [[Cardinal (Catholicism)|cardinal]] {{lang|la|in pectore}} (published 13 March 1826) by Pope [[Leo XII]],{{sfn|McBrien|2000|p=335}} and shortly afterwards he was asked to negotiate a [[concordat]] to safeguard the rights of Catholics in the [[United Kingdom of the Netherlands]], a diplomatic task which he completed successfully. He also negotiated a peace on behalf of [[Armenian Catholic]]s with the [[Ottoman Empire]]. He publicly condemned the [[November Uprising|Polish revolutionaries]], who he thought were seeking to undermine Russian Tsar [[Nicholas I of Russia|Nicholas I]]'s efforts to support the [[Bourbon Restoration in France|Catholic royalist cause]] in France by forcing him to divert his troops to suppress the uprising in Poland.<ref>{{cite web| url=http://www.pan-ol.lublin.pl/wydawnictwa/THist8/Korten.pdf| title=Pope Gregory XVI to Bring about a Decision| publisher=C Korten| access-date=13 July 2017| archive-date=21 January 2019| archive-url=https://web.archive.org/web/20190121175236/http://www.pan-ol.lublin.pl/wydawnictwa/THist8/Korten.pdf| url-status=dead}}</ref>

Cappellari had never travelled outside Italy and was most familiar with Venice and Rome. He spoke Italian and Latin fluently, but no other European languages, and did not understand European politics.<ref name=owen>{{cite book |url=https://books.google.com/books?id=xtbLJZOKxx8C&pg=PA31 |page=31 |title=A History of the Popes, 1830–1914 |isbn=978-0199262861 |last1=Chadwick |first1=Owen |year=2003 |publisher=Oxford University Press }}</ref> However, he was proficient in [[Armenian language|Armenian]], and [[Haruti'iwn Awgerian]] ([[Pascal Aucher]])'s 1827 Venice edition of works attributed to [[Severian of Gabala]] and translated into Armenian was dedicated to him.