He defended the real presence of Christ in the Eucharist and intuited the Virgin Mary's Immaculate Conception.

He wrote the second Gospel on the direct appeal of the first Christians of Rome, attracted by the teachings of St. Peter.

He was martyred by the Calvinists after having converted many of them to the true faith.

He was already the object of an extensive and ancient cult long before the legendary image of his fight with the dragon, symbolizing the intrepid faith that triumphs over evil.

His martyrdom took place during the persecutions ordered by Septimius Severus.

Considered by some to be the founder of Scholasticism, he devised a famous argument on the existence of God, which has engaged generations of philosophers and theologians.

In 1374 Our Lord revealed to Saint Catherine of Siena that in Paradise she would enjoy a glory equal to that of Saint Agnes of Montepulciano (c. 1268-1317). This fact is indicative of the greatness of this relatively little known mystic.

His iconography has rendered the various hagiographic accounts with very suggestive symbols.

He occupies a prominent place next to two giants, Saint Ambrose and Saint Charles Borromeo.

The principal founder of the Cistercian Order, Saint Robert of Molesme (c. 1029-1111), promoted the return to a simple and austere monastic life, docilely abandoning himself to the action of grace.

On 22 February 1931 Jesus first communicated to St. Faustina Kowalska His desire for a Feast of Divine Mercy to be celebrated on the first Sunday after Easter. On that same occasion Our Lord made her a solemn promise, valid for every pilgrim soul on earth.

They were disciples of Peter and Paul at the time of emperor Nero. After the martyrdom of the two holy apostles they piously took care of the burial of their bodies.