Originally published September 15, 2017

This year marks the 500th anniversary of the beginning of the Protestant Reformation. October 31, 2017 will commemorate the date in 1517 when Martin Luther famously nailed his 95 theses – a list of grievances against the Catholic church for unbiblical doctrines and practices – to the door of Castle Church in Wittenberg, Germany.

Luther’s calls for reform spread quickly throughout Europe, inspiring the likes of church fathers Ulrich Zwingli (Zurich), John Calvin (Geneva), and John Knox (Scotland) to join the effort in their own locales. As they worked to address the issues raised in Luther’s document, these men codified what we know today as the “Five Solas of the Reformation,” the basis of Protestant church doctrine. The five solas are:

1. Sola Scriptura– Scripture alone is the basis for all church doctrine, belief, and practice. (2 Timothy 3:16-17)

2. Sola Gratia