Today is the feast day of St. Bartholomew, Apostle and Martyr.
He was introduced to Our Lord through St. Philip, by the name of Nathaniel. Scholars have assumed that Nathaniel of the gospel of St. John is the same man as Bartholomew of the synoptic gospels.
Tradition has it that after the Ascension of Christ St. Bartholomew went on missions to India, Ethiopia, Mesopotamia, and Parthia. He along with St. Jude brought Christianity to Armenia. It is said that there he was flayed alive (ew) and crucified upside down (Like St. Peter). Tradition also has it that before his death he converted the king of Armenia, but the order of his death was given by his brother, who was of some royalty in order to give such an order.
He has been revered in the Church since he was martyred, as where the other Apostles.