As the Church completes her observance of the Octave of Sts. Peter and Paul today, the traditional Roman Martyrology on this day also recalls to our minds the martyrdom of the Old Testament prophet who foresaw not only the marvelous saving works of the Lord Jesus Christ, but even Christ's establishment of the Petrine Office -- the holy prophet Isaias son of Amos:
This Day, the Sixth Day of July
The Octave of the holy Apostles Peter and Paul.
In Judea, the holy prophet Isaias. In the reign of king Manasses he was put to death by being sawed in two and was buried beneath the oak Rogel, near a running stream.
A 1315 painting of St. Isaias in the Palazzo Pubblico of Siena, Italy
