The dogma Extra Ecclesiam Nulla Salus (outside the Church there is no salvation) has seen numerous interpretations as a result of the theological revolutions of the 20th century and misconceptions in the post-conciliar era. In this article we will examine the doctrine and how it relates to the nature of the Church. Included will be how the words “outside” and "inside" pertain to membership in the Church and salvation. We will also look at whether the concept of “Church of Christ” is a distinct entity from the Catholic Church.