Pope Leo IILeo II
from August 682
to July 683
, was a Sicilian
by birth, and succeeded Agatho
. Agatho had been represented at the Sixth Ecumenical Council
(that of Constantinople
) where Pope Honorius I
was anathematized for his views in the Monothelite
controversy as a favourer of heresy, and the only fact of permanent historical interest with regard to Leo is that he wrote once and again in approbation of the decision of the council and in condemnation of Honorius, whom he regarded as one who "profana proditione immaculatem fidem subvertare conatus est." In their bearing upon the question of papal infallibility
these words have excited considerable attention and controversy, and prominence is given to the circumstance that in the Greek text of the letter to the emperor which the phrase occurs, the milder expression "subverti permisit" is used for "subvertare conatus est".
This Hefel in his Conciliengeschichte (iii, 294) regards as alone expressing the true meaning of Leo. It was during Leo's pontificate that the dependence of the see of Ravenna upon that of Rome was finally settled by imperial edict.
original text taken from the 9th edition (1882) of a famous encyclopedia.