Assertion: infallibility | /r/HasProperty | invoked by pope
Facets:
value: only twice
type: TEMPORAL
Source sentences:
text: Infallibility has been invoked by popes only twice: by Pius IX, in defining the Immaculate Conception of the Blessed Virgin in 1854 (16 years before papal infallibility itself was actually defined at Vatican I), and by Pius XII, in defining the dogma of the Assumption of the Blessed Virgin in 1950.