St. Ildephonsus (Mass in Some Places)

Today in the pre-1955 Traditional Catholic Missal is the Mass in Some Places (pro aliquibus locis) of St. Ildefonse.  St. Ildefonse was a scholar and theologian who served as the metropolitan Bishop of Toledo for the last decade of his life. His writings were influential across much of the Hispanic world. 

The following account is given in today's martyrology:

At Toledo, St. Ildefonse, bishop, renowned for sanctity. On account of his great purity of life, and his defense of the virginity of the Mother of God against the heretics who denied it, he received from her a brilliant white vestment, and was called to Heaven

Catholic Online shares the following short account of his praiseworthy life:

St. Ildephonsus is highly regarded in Spain and closely associated with devotion to the Blessed Virgin which he fostered by his famous work concerning her perpetual virginity. Born around 607, Ildephonsus came from a noble family and was probably a pupil of St. Isidore of Seville. While still quite young, he entered the Benedictine monastery of Agalia near Toledo and went on to become its Abbot. In that capacity he attended the Councils of Toledo in 653 and 655. 

In 657 the clergy and people elected this holy man to succeed his uncle, St. Eugenius, as Archbishop of Toledo. He performed his episcopal duties with diligence and sanctity until his death in 667. This saint was a favorite subject for medieval artists, especially in connection with the legend of Our Lady's appearance to present him with a chalice. St. Ildephonsus was a prolific writer, but unfortunately only four of his works have survived. Among these are the one already mentioned and an important document of the history of the Spanish Church during the first two-thirds of the seventh century, entitled Concerning Famous Men.

Dom Gueranger writes of him in his work "The Liturgical Year." The following is an excerpt:

Among the glorious Pontiffs, who honoured the noble episcopate of Spain, during the 7th and 8th centuries—for example: Leander, Isidore, Fulgentius, Braulio, Eugenius, Julian, Helladius—among them, and in the foremost rank, stands Ildephonsus, with his glory of having been the Doctor of the Virginity of the Mother of God, just as Athanasius is the Doctor of the Divinity of the Word, Basil the Doctor of the Divinity of the Holy Ghost, and Augustine the Doctor of Grace. The holy Bishop of Toledo has treated the dogma of Mary’s Virginity in all its completeness. With profound learning and with fervid eloquence, he proves, against the Jews, that Mary conceived without losing her Virginity; against the followers of Jovinian, that she was a Virgin in her Delivery; against the disciples of Helvidius, that she remained a Virgin, after she had given birth to her Divine Son. Other holy Doctors had treated separately on each of these sublime questions, before our Saint: but he brought together all their teachings, and merited that a Virgin-Martyr should rise from her tomb to thank him for having defended the honour of the Queen of Heaven. Nay, Mary herself, with her own pure hand, clothed him with that miraculous Chasuble, which was an image of the robe of light wherewith Ildephonsus shines now in heaven, at the foot of Mary’s Throne.