ayrıca (bkz: konklavizm
sedevacantism is the position, held by a minority of traditionalist catholics, that the present occupant of the holy see is not truly pope due to the mainstream church's espousal of the heresy of modernism and that, for lack of a valid pope, the see has been vacant since the death of pope pius xıı in 1958.
the term "sedevacantism" is derived from the latin phrase sede vacante, which literally means "with the chair [of saint peter] vacant". the phrase is commonly used to refer specifically to a vacancy of the holy see from the death or resignation of a pope to the election of his successor. "sedevacantism" as a term in english appears to date from the 1980s, though the movement itself is older.
among those who maintain that the see of rome, occupied by what they declare to be an illegitimate pope, was really vacant, some have chosen an alternative pope of their own, and thus in their view ended the vacancy of the see, and are known sometimes as "conclavists".
the number of sedevacantists is largely unknown, with estimates given in tens of thousands to hundreds of thousands.