The Founders of the New Devotion by Thomas à Kempis is a 14th/15th-century historical account detailing the lives of Gerard Groote, Florentius Radewin, and their followers (the Brethren of the Common Life). It chronicles the rise of the Devotio Moderna movement in the Low Countries, focusing on personal piety, communal living, education, and the imitation of Christ. Highlights the movement’s goal to reform the church through simple, devout living and spiritual renewal rather than rigid scholasticism.This work is considered a vital source for understanding medieval spirituality, particularly in the Netherlands, and emphasizes the shift toward internal piety