Council of Florence (1438-1445)
The sixth sacrament is holy orders.
Council of Trent (1545-1563),
In conformity with God's decree, sacrifice and priesthood are
so related that both exist in every law. Therefore, in the New
Testament, since the Catholic Church has received the holy
and visible sacrifice of the Eucharist according to the institution
of the Lord, it is likewise necessary to acknowledge that there
is in the Church a new, visible, and external priesthood, into
which the old priesthood was changed. Moreover, Sacred
Scripture makes it clear that this priesthood was instituted
by the same Lord our Savior, and that the power of consecrating,
offering, and administering his body and blood, and likewise
the power of remitting and of retaining sins, was given to the
apostles and their successors in the priesthood."