Sedevacantism is the position , held by a minority of traditionalist Catholics , that the present occupant of the papal see is not truly pope and that , for lack of a valid pope , the see has been vacant since the death of Pope Pius XII in 1958 .
Sedevacantism is the position , held by a minority of Traditionalist Catholics , that the present occupant of the papal see is not truly pope and that , for lack of a good pope , the see has been vacant since the death of Pope Pius XII in 1958 .