St. Valentine was a holy priest in Rome, who, with St. Marius and his family, assisted the martyrs in the persecution under Claudius II. Since he was caught marrying Christian couples and aiding any Christians who were being persecuted under Emperor Claudius in Rome [when helping them was considered a crime], Valentinus was arrested and imprisoned. When he refused to renounce his faith he was beaten with clubs, and afterwards, beheaded on February 14, about the year 270.
All Saint’s Day (or officially The Solemnity of All Saints) is instituted to honor all the saints, known and unknown, and, according to Urban IV, to supply any deficiencies in the faithful's celebration of saints' feasts during the year. In the early days the Christians were accustomed to solemnize the anniversary of a martyr's death for Christ at the place of martyrdom.
Pope St. Simplicius reigned when the last of the western Roman Emperors fell in 476 a.d.. He defended the action of the Council of Chalcedon against the Eutychian heresy, labored to help the people of Italy against the marauding raids of barbarian invaders. He worked to maintain the authority of Rome in the West.
Good Friday is the Friday within Holy Week, and is traditionally a time of fasting and penance, commemorating the anniversary of Christ's crucifixion and death. For Christians, Good Friday commemorates not just a historical event, but the sacrificial death of Christ, which with the resurrection, comprises the heart of the Christian faith.
Saint Jerome (Eusebius Hieronymus), c.347-420, was a Father of the Church and Doctor of the Church, whose great work was the translation of the Bible into Latin, the edition known as the Vulgate. He was born at Stridon on the borders of Dalmatia and Pannonia (roughly modern Slovenia & Croatia) of a well-to-do Catholic family. His parents sent him to Rome to further his intellectual interests, and there he acquired a knowledge of classical literature and was baptized at the age of 19. Shortly thereafter he journeyed to Trier in Gaul and to Aquileia in Italy, where he began to cultivate his theological interests in company with others who, like himself, were ascetically inclined.
Saint Paul of the Cross originally named Paolo Francesco Danei, was born on 3 January 1694, in the town of Ovada, Piedmont, between Turin and Genoa in the Duchy of Savoy in northern Italy. He is considered to be among the greatest Catholic mystics of the eighteenth century.