Munificentissimus Deus, issued by Pius XII invoked this in order to declare the Assumption of Mary.
Accepted at the 4th council of Constantinople, the Formula of Hormisdus was one of the earlier proponents of this principle which was notably opposed by Iganz von Dollinger. Intent to bind is one of the conditions for this principle to hold and was reaffirmed in the document Lumen Gentium. Proclamations invoking this principle are always ended with an anathema, recalling St. Augustine's statement that "Rome has spoken, the case is closed." Munificentissimus Deus, issued by Pius XII invoked this in order to declare the Assumption of Mary. FTP, Name this Catholic Church Dogma which states that when its leader speaks ex cathedra on matters of faith and morals, his teachings are always right. 
Accepted at the 4th council of Constantinople, the Formula of Hormisdus was one of the earlier proponents of this principle which was notably opposed by Iganz von Dollinger.
Papal infallibility [Prompt on partial answer]