This pope beatified the Twenty-Six Martyrs of Japan and rejected the Law of (*) Guarantees, which stripped him of his temporal power after the Battle of Castelfidardo.
The Accordamento allowed this pope to fill vacant sees in Russia. A theological critic of this man was the author of the Janus Letters, Ignaz von Dollinger. Luigi Brunetti stabbed this pope's advisor Pellegrino Rossi to death, and a group of his supporters were called the Black Nobility. This pope beatified the Twenty-Six Martyrs of Japan and rejected the Law of (*) Guarantees, which stripped him of his temporal power after the Battle of Castelfidardo. His encyclical Ubi Primum defined the doctrine of the Immaculate Conception. This pope convened the First Vatican Council and defined papal infallibility. He also posted a set of eighty condemned statements in the "Syllabus of Errors." For 10 points, name this pope who ruled during 1848 and Italian Unification, the longest-reigning pope in history.
The Accordamento allowed this pope to fill vacant sees in Russia.
Pius IX [or Giovanni Maria Mastai-Ferretti; prompt on "Pius"]