Petr Chelčický was a Czech Christian spiritual leader and author in the 15th century Bohemia, now the Czech Republic. He was one of the most influential thinkers of the Bohemian Reformation. Petr Chelčický inspired the Unitas Fratrum, who opposed transubstantiation and monasticism, insisting on pacifism and the primacy of scripture. There are multiple parallels with the teachings of the Anabaptists and Petr Chelčický. Czech Baptists have also expressed continuity with the Bohemian reformation by identifying with Petr Chelčický.

The Waldensians, also known as Waldenses, Vallenses, Valdesi, or Vaudois, are adherents of a church tradition that began as an ascetic movement within Western Christianity before the Reformation. Originally known as the Poor of Lyon in the late twelfth century, the movement spread to the Cottian Alps in what is today France and Italy. The founding of the Waldensians is attributed to Peter Waldo, a wealthy merchant who gave away his property around 1173, preaching apostolic poverty as the way to perfection.