In 1387 a site was secured at Windesheim, some north of Deventer, and here was established the monastery that became the cradle of the Windesheim Congregation of canons regular embracing in course of time nearly one hundred houses, and leading the way in the series of reforms undertaken during the 15th century by all the religious orders in Germany. Henceforth his communities, which were spreading rapidly through the Netherlands, Lower Germany, and Westphalia, claimed and received all his attention. He contemplated organizing his clerics into a community of canons regular, but it was left to Radewyns, his successor, to realize this plan at Windesheim two years later. A movement known as the Modern Devotion (Devotio Moderna) was founded in the Netherlands by Groote and Florens Radewyns, in the late fourteenth century. For Grote the pivotal point is the search for inner peace, which results from the denial of one's own self and is to be achieved by "ardour" and "silence". This is the heart of the "New Devotion", the "Devotio moderna". Solitary meditation on Christ’s Passion and redemption, on one’s own death, the Last Judgment, heaven, and hell was essential. In the course of the 15th century, the Modern Devotion found adherents throughout the Netherlands and Germany. Its precepts were further disseminated in texts such as "The Imitation of Christ" by Thomas à Kempis, which reached an increasingly literate public. In this context small works of art such as diptychs that provided a focus for private worship enjoyed wide popularity. Geert Groote College is located in Amsterdam. An account, based on the "Britannica" sources, is in S. Kettlewell, "Thomas à Kempis and the Brothers of Common Life" (1882), i. c. 5; and a shorter account in F. R. Cruise, "Thomas à Kempis", 1887, pt. ii. A sketch, with an account of Groote's writings, is given by L. Schulze in Herzog-Hauck, "Realencyklopädie" (ed. 3); he insists on the fact that Groote's theological and ecclesiastical ideas were those commonly current in his day, and that the attempts to make him a reformer before the Reformation are unhistorical.