The Devotio Moderna, begun by Geert Groote at Deventer, formed communities of the Brothers and Sisters of the Common Life and canons regular devoted to simplicity, inner prayer and the imitation of Christ. Its finest fruit is The Imitation of Christ, attributed to Thomas à Kempis.
Devotio Moderna
The “modern devotion”: a fourteenth-century movement of interior piety in the Low Countries.
Also: modern devotion