According to an early Christian tradition from a medieval document, Martyrium Ignatii, and the many letters originally attributed to Ignatius, he was apprehended in his native Antioch, interrogated by Emperor Trajan himself, and sent to Rome for public execution by being thrown to wild animals. Along the way, Ignatius wrote many letters, of which seven are generally thought to be genuine, to various congregations. One letter which Ignatius wrote was sent ahead to the Christians of Rome, which among other things begged them not to interfere with his approaching execution or intercede on his behalf.
Igantius' epistle to the Romans is problematic. Either Trajan did not personally order the execution of Ignatius, casting doubts on its authenticity, or its plea that the Romans not intercede on his behalf (the purpose of this letter) is not authentic. An appeal was possible from a lower tribunal, but not from the emperor's, so that it would have been useless for him to forbid the Roman Christians to intercede in his behalf.
Such a long and elaborate trip halfway across the Roman Empire would have been expensive  especially with all of the lengthy stopovers when Ignatius' supposedly brutal guards gave him every opportunity to spend time with his friends. We know that Romans did not ship prisoners of ordinary status around the Empire for execution, so this journey seems a fable. Furthermore, given what we know of Trajan, it does not seem likely that he personally interrogated Ignatius and then ordered his execution based upon his Christianity. In his subsequent correspondence with Pliny the Younger, governor of Bithynia , Trajan appears never to have heard of Christians, and took the very moderate position of ordering that they not be rooted out, and executed only if exposed and then only if they refused to make obeisance to the Roman deities.
Scholars dismiss the Martyrium as a fable that flies in the face of plausibility, although it can not be absolutely ruled out. We do not really know whether Ignatius of Antioch was a real, historical person, nor how he died.
Ignatius was thrown to wild animals by the Romans about the year 107 at Rome, Italy.
St Ignatius died because he was a powerful leader in the Christian community at this time. Because he was so powerful, emperor Trajan thought that if he died it would make Christians come over to his religion. So he had him thrown into Circus Maximus. (aka the big coliseum in Rome) And that's the end of that.
There are a number of saints named Ignatius so you need to be more specific. For example: Ignatius of Loyola or Ignatius of Antioch.
St. Ignatius of Antioch was devoured by lions in the Roman Colosseum.
Ignatius of Antioch was born in c. 35
Ignatius IV of Antioch was born in 1921.
Saint Polycarp of Antioch was martyred at Antioch - date unknown.
The three degrees of Clergy are the Bishop-priest-Deacon
There are at least eight saints named Ignatius, you need to be more specific.
Ignatius was not canonized as the process did not come into place until the 12th century. He was declared a saint by the early Christian community based on his life of heroic virtue and martyrdom.
Saint Ignatius of Loyola, the founder of the Jesuits, was canonized for his exemplary life of devotion to God, his spiritual writings, and his leadership in the Catholic Church. He devoted his life to promoting faith and spirituality, establishing the Society of Jesus and contributing to the Counter-Reformation. His dedication to education and mission work also played a significant role in his canonization.
Which Saint Ignatius? There are several.
Saint Ignatius of Antioch is perhaps the most famous example, but there were dozens of named saints who were fed to the lions by the Romans.
Be more specific. There are many St. Ignatius (St. Ignatius of Antioch, St. Ignatius Loyola, etc.)