Groote’s message of reform had also been aimed at clerics and priests, some of whom had joined the Brethren. In addition, though, under the leadership of Radewyns, in 1387 some members of the Deventer house set up a new community at Windesheim, near Zwolle, and adopted the habit and rule of St Augustine. Although living a cloistered life under vows, the new community kept many of the practices and spiritual values of the teaching of Groote and Radewyns. From 1395, a monastic union was set up around Windesheim; this new confederation grew quickly, and was joined both by older Augustinian communities (including, famously, Groenendaal in 1413), as well as new foundations, and sometimes the conversion of some of the houses of Brothers to this new form of religious life. By the end of the fifteenth century, there were almost 100 houses (84 of them male) in the Chapter of Windesheim.