This article emphasizes how many doctrines and practices in today’s Catholic Church were not quick and entirely ancient elements of the church. Although they had to develop over time, they also had to change and adapt when the church eventually modernized. This source presents a timeline of when various practices and concepts were introduced and developed. Two examples of these were the dogmas of the Immaculate Conception in 1854 and the Assumption of Mary in 1950. To explain all of these evolutions, the author introduced the idea of a “three-legged stool” of Catholicism - Sacred Scripture, Sacred Tradition, and the Magisterium.