St. Sebastian was martyred for his faith in Rome about the year 288. Shortly after his death people who knew of his heroic act already considered him to be a saint. This opinion was generally accepted by the early church. It was not for more than 1000 years after Sebastian's death that a formal procedure for canonization was instituted by the Church. He is classified as a "pre-congregational" saint because he was already declared a saint before the Sacred Congregation for the Causes of Saints took form that investigates candidates for sainthood.
He was martyred for his faith.
Sebastian was not canonized. He was proclaimed a saint by early Christians because of his martyrdom. The canonization process did not come into existence until the 12th century.
St. Francis Xavier was canonized with fellow missionary St. Ignatius in 1622.
St. Eligius was canonized in the Pre-Congregation era. This was when people were often canonized because of their popularity while they were alive.
St. Etheldreda was canonized by Pope Celestine III in 1198.
St. Anselm was canonized in 1494.
There are thousands of canonized saints, not just five.
No, Saint Patrick was never formally canonized
Yes, St. Odilia was canonized. She is known as a patron saint of the blind and visual difficulties.
St. Sebastian was never married.
St. Sebastian was born in Narbonne, in present-day France.
St. Clare of Assisi was canonized on September 26, 1255, by Pope Alexander IV.