Hermann Kanzler defended the capital of a ruler with this title during an attack that was described by Maitland Armstrong. A holder of this title, who petitioned Franz Josef I to go into exile to Trieste or Salzburg, was an associate and subject of historian Ludwig von Pastor and embraced unions in the piece Rights and Duties of Capital and Labor. A holder of this title, who rejected the Law of Guarantees, condemned liberalism in the (*) Syllabus of Errors. That holder of this position struggled against Otto von Bismarck after he helped pass the May Laws. Holders of this position were deprived of judicial power in a period ended by the Lateran Treaty and that began with Victor Emmanuel II’s capture of a certain city. For 10 points, holders of what title were dubbed “prisoner in the Vatican?” ■END■
ANSWER: Pope [or pontiff or Holy See or King of the Vatican or King of the Papal States]
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= Average correct buzz position