St. Bruno founded a religious order, the Carthusians, which is the most demanding, the most strict and the most difficult in which to live – and yet many young men choose it as a way of making a life-long sacrifice for the glory of God.
Born in Cologne, Germany, St. Bruno became a famous teacher at Rheims and an important official the archdiocese. It was a time when many clergy were living lives that were incompatible with their calling, and when Pope Gregory VII brought about reforms, Bruno completely supported it. In fact, he took part in getting his own scandalous archbishop removed from office – of course, the archbishop had his friends, and they made life very difficult for Bruno.
After all this, St. Bruno had the dream of living in solitude and prayer, and persuaded a few friends to join him in a hermitage, and eventually was given some land which was to become famous for his foundation "in the Chartreuse" which described the color of the countryside (yellowish green, and from which comes the word “Carthusian”). The climate, desert, mountainous terrain and inaccessibility guaranteed silence, poverty and small numbers.
Bruno and his friends built an oratory with small individual cells at a distance from each other. They met for Matins and Vespers each day, and spent the rest of the time in solitude, eating together only on great feasts. Their chief work was copying manuscripts.
The pope, hearing of Bruno's holiness, called for his assistance in Rome. When the pope had to flee Rome, Bruno pulled up stakes again, and spent his last years (after refusing becoming a bishop) in the wilderness of Calabria.
He was never formally canonized, because the Carthusians avoided all occasions of publicity. Pope Clement extended his feast to the whole Church in 1674.
Almighty and everlasting God, who dost prepare mansions in heaven for them that forsake the world: we humbly entreat thy boundless mercy; that at the intercession of blessed Bruno, thy Confessor, we may be faithful to vows that we have made, and may obtain, to our eternal salvation, the rewards which thou hast promised to them that persevere unto the end; through Jesus Christ thy Son our Lord, who liveth and reigneth with thee, in the unity of the Holy Spirit, ever one God, world without end. Amen.