Aachen observance and Augustinian canons lived side by side, seemingly harmoniously. This was typical in many houses of the canons of the Ordo Antiquus model. As the Aachener canons died off, the community became fully "regular". On 20 July 1642, Peter IV Mauritius Odet (1640–1657) was consecrated abbot. As a reformer, he was supported vigorously by the Congregation of Our Savior, founded by St. Peter Fourier. At the opening of the 21st century, the canons continue to witness to Christ through the common life for priests and pastoral service to the Church through parish work and the secondary school run at the abbey. The Austrian Congregation of Canons Regular was formed in 1907, composed of the various ancient monasteries, abbeys, and collegiate churches of canons regular in Austria: St. Florian's Priory, Klosterneuburg Priory, Herzogenburg Priory, Reichersberg, Vorau and Neustift (now in Italy). The Austrian Congregation looks after scores of parishes in Austria as well as one in Norway. The Austrian congregation, as an example, wears a sarozium, a narrow band of white cloth—a vestige of the scapular—which hangs down both front and back over a cassock for their weekday wear. For more solemn occasions, they wear the rochet under a violet mozzetta. Subsequently, other congregations of canons regular joined the confederation: The Windesheim Congregation (Paring, Germany) originated with Gerard Groot's, Brethren of the Common Life. A preacher and reformer of the 14th century, at Deventer in the Low Countries, many poor clerical students gathered around him and, under his direction, "putting together whatever they earned week by week, began to live in common." Groot resolved to place this new institute under the spiritual guidance of the canons regular. The execution of this resolve was left by Gerard Groot, at his death, to his disciple, Florentius Radwyn. The foundation of the first house was at Windersheim, near Zwolle. This became the mother-house of the congregation, which, only sixty years after the death of Groot, possessed in Belgium alone more than eighty monasteries, some of which, according to the chronicler John Buschius, contained as many as a hundred, or even two hundred residents. The congregation continued until the devastations of the Reformers drove it from its native soil, and it was at last utterly destroyed during the French Revolution. The revival of the congregation was proposed under the pontificate of Pope Pius XII. Permission for this was granted by Pope John XXIII