1Saint Hippolytus: torn apart by horses
Feast day: August 13 (August 30 in the East) (Photo)
2Saint Ignatius Of Antioch: sentenced to be eaten by lions at the Coliseum
The Emperor was a humane man, yet the gratitude which he felt he owed to his own pagan gods for his victories over the Dacians and the Scythians later led him to authorize the death penalty for those Christians who refused to acknowledge these divinities publicly.
According to the legend, Trajan ruled that Ignatius should die. He was bound and conveyed to Rome, to be devoured by wild beasts in the Colosseum. He reached Rome on December 20, the last day of the games, and was brought at once before the prefect, to whom the Emperor's letter was delivered. At the prefect's command, the prisoner was hurried off to the Colosseum, where two fierce lions were let out and Ignatius was at once killed.
His feast day is February 1. (Source)
3Saint Lawrence: grilled and toasted alive
As librarian and archivist, Lawrence was thought to have a list of all the members of the early Church, and the locations of all the mythical hidden hoards of gold belonging to the Vatican. Captured by the soldiers of the Emperor Valerian, he was told to produce all the wealth of the Church. He was given only two days to bring all the treasures to the imperial palace. Lawrence gathered up all the diseased, orphaned or crippled Christians on the appointed day, brought them to the palace, and told the startled emperor that "These are the treasures of the Church!"
According to tradition, for his impudence, Lawrence was slowly roasted on a grill on the site of the Basilica di San Lorenzo in Rome, in the hope that he would publicly renounce his religion and reveal the names of the wealthy Christians. He is often represented holding a gridiron to memorialize this grisly manner of martyrdom. Although St. Lawrence was most certainly beheaded and not roasted, the traditions of his being cooked are somewhat stronger than actual fact. As a result, St. Lawrence is also considered a patron saint for cooks.
There is also the popular story that he was so willing to embrace Christ in heaven, that he did not mind the pain from the fire of his martyrdom, and indeed, he found the strength to tell his executioners "Turn me over. I am done on this side." The courage and dignity of St. Lawrence and many of these other early Christians in facing their death did much to gain respect for their religion in Rome, and after the death of St. Lawrence, there was widespread conversion to Christianity.
His feast day is August 10th. (Source | Photo)
4Saint Agatha of Sicily: had her breasts cut off
As his proposals were resolutely spurned by the young girl, he put her in charge of an evil woman, whose efforts at seduction were thwarted by Agatha's commitment to her Christian faith. Quintianus then had her subjected to various cruel tortures. Of these, the most barbaric was an order to have her breasts cut off. This became the peculiar characteristic in medieval images of the saint.
However, it was said that Agatha was consoled by a vision of St. Peter, who healed her miraculously. Her scorned admirer eventually sentenced her to death by being burnt at the stake. However, she was saved from this fate by a mysterious earthquake. She later died in prison as a result of the repeated cruelties inflicted on her.
Her feast is kept on 5 February and she has been venerated as patron saint of breast cancer patients. (Source)
5Saint Bartholomew: skinned alive
After the Resurrection, he is traditionally believed to have preached in India and Armenia. Tradition holds that in Armenia he was flayed alive and then crucified upside down for refusing to worship pagan gods. This fate led to him being adopted as the patron saint of tanners.
He is represented in Michelangelo's Last Judgment, with his own skin hanging over his arm. (Source 1 | Source 2)
6Pope St. Clement: tied to an anchor and thrown into the sea
He is the author of an Epistle to the Corinthians which was written c. 96 AD in the name of the Church of Rome to deal with disturbances in the Church at Corinth. The letter is one of the earliest witnesses to the authority of the Church of Rome and was so highly regarded that it was read publicly at Corinth with the Scriptures in the second century.
St. Clement converted many high-ranking citizens of the region before being exiled to Crimea by emperor Trajan. There, with the charisma of miracles, he converts several thousand to Christianity. Learning of this, Trajan condemns Clement to death by drowning him into the sea with an iron anchor.
About the year 868 A.D., St. Cyril recovered some human bones and an anchor which he believed to be the relics of St. Clement. He took these relics to Rome where they were joined with relics of St. Ignatius of Antioch at the basilica of St. Clement in Rome.
His feast day is November 23. (Source | Photo)
7Saint Agnes of Rome: sent to a brothel then condemned to be burned
The dejected Phocus later learned that Agnes was a Christian and denounced her to his father. Sempronius questioned her officially, and she freely admitted her faith in Jesus. He ordered her to go the temple of Vesta, to offer her a sacrifice but Agnes steadfastly refused any compromise with pagan practice.
Threats of death also did not sway her (some sources indicate that Roman law did not permit the execution of virgins), so the judge threatened her chastity instead. Agnes was stripped naked and dragged through the streets to a brothel. On the way, as the saint prayed, her hair miraculously grew and covered her body to protect her modesty. According to the legend, at the brothel, she managed to remain a virgin. She was then condemned as a witch and led out tied to a stake to be burned. However, the bundle of wood would not burn, whereupon the officer in charge drew his sword and struck off her head (or stabbed her in the throat). The execution reportedly shocked even the bloodthirsty pagan crowd, since Agnes was so young and pure. Thus, her death created a new wave of sympathy for the Christians and brought many to the faith.
Her feast day is celebrated on January 21. (Source)
8Saint Sebastian: martyred twice
Because Sebastian was thought to have been killed by the arrows, and yet was not, and then later was killed by the same emperor who ordered him shot, he is sometimes known as the saint who was "martyred twice." (Source 1 | Source 2)
9Saint Catherine: condemned to death on a breaking wheel
Her feast day is celebrated on 25 November by most Christian churches. (Source 1 | Source 2)
10Saint Symphorosa: thrown to the river, then had her 7 kids killed
When all the emperor's attempts to induce Symphorosa and her sons to sacrifice to the gods were unsuccessful, he ordered her to be brought to the Temple of Hercules, where, after various tortures, she was thrown into the river (Anio), with a heavy rock fastened to her neck. The next day the emperor summoned her seven sons, and ordered them to be tied to seven stakes, which had been erected for the purpose round the Temple of Hercules. Each of them suffered a different kind of martyrdom. Crescens was pierced through the throat, Julian through the breast, Nemesius through the heart, Primitivus was wounded at the navel, Justinus was pierced through the back, Stracteus (Stacteus, Estacteus) was wounded at the side, and Eugenius was cleft in two parts from top to bottom.
Their bodies were thrown into a deep ditch at a place which the pagan priests afterwards called "Ad septem Biothanatos." (The Greek word biodanatos, or rather biaiodanatos, was employed for self-murderers and, by the pagans, applied to Christians who suffered martyrdom).
The Church celebrates their feast 18 July. (Source)