Flemish mystic. He retired to a hermitage at Groenendaal, near Brussels, with two other priests in 1343. They were joined by others and in 1350 the group became a community of Canons Regular, with Ruysbroeck as prior until his death. Groenendaal became prominent in the religious movement later known as ‘Devotio Moderna’. Ruysbroeck wrote almost entirely in the vernacular of the country, Middle Dutch. His works (with their titles in English) include The Spiritual Espousals, The Mirror of Eternal Salvation, The Seven Steps of the Ladder of Spiritual Love, and The Sparkling Stone. Feast day, 2 Dec.