Given the tempo of the liturgical season with its feasts it is easy to overlook that one saint who for many centuries was, after Mary and Joseph, the most venerated person in European Christendom.
St. Thomas Becket, Archbishop of Canterbury was assassinated in his cathedral on December 29, 1170 because of his opposition to his former friend, King Henry II of England, who was encroaching on the liberties of the English Church.
Devotion to him spread like wildfire. He was enshrined in the hearts of men, and in their arts. In statues and stained glass, in song and story this good bishop was everywhere to be found: France, Italy, Spain, Sweden. Many miracles were attributed to his heavenly advocacy. — Excerpted from Days of the Lord
The saints who are assigned immediately following Christmas are honored because of their special connection with Christ. December 29, the Feast of Saint Thomas Becket, Archbishop of Canterbury, who was martyred in his cathedral by the soldiers of Henry II in 1170, is the true anniversary date of his death.
Because of the great shock and sensation that this martyrdom caused at a time when all of Europe was Catholic, the Roman authorities, in the thirteenth century, deemed it appropriate to assign the celebration of his feast within the privileged days of Christmas week, thus adding him to the group of "Christ's nobility."