St. Thomas is also mentioned as being present at another Resurrection appearance of Jesus - at Lake Tiberias, when a miraculous catch of fish occurred.
This is all that we know about St. Thomas from the New Testament. Tradition says that at the dispersal of the Apostles after Pentecost this saint was sent to evangelize to the Parthians, Medes, and Persians. He ultimately reached India, carrying the Faith to the Malabar coast, which still boasts a large native population calling themselves "Christians of St. Thomas."
According to tradition, Thomas was killed in an accident when a fowler shot at a peacock and struck Thomas instead. Following his death, some of his relics were taken to Edessa while the rest were kept in what is now known as India. They can still be found within the San Thome Basilica in Chennai, Mylapore, India.
The relics taken to Edessa were moved in 1258 to Italy, where they can be found in the Cathedral of St. Thomas the Apostle in Ortona, Italy. However, it is believed that Saint Thomas' skull rests in the Monastery of Saint John the Theologian on the Greek Island Patmos.
In art, Saint Thomas is commonly depicted as a young man holding a scroll, or as a young adult touching the resurrected Christ's wounds.
Saint Thomas was mentioned in several texts, including one document called The Passing of Mary, which claims then-apostle Thomas was the only one to witness the Assumption of Mary into heaven, while the other apostles were transported to Jerusalem to witness her death.
While the other apostles were with Mary, Thomas was left in India until after her first burial, when he was transported to her tomb and he saw her bodily assumption into heaven, when her girdle was left behind.
In versions of the story, the other apostles doubted Thomas' words until Mary's tomb was discovered to be empty with the exception of her girdle. Thomas and the girdle were often depicted in medieval and early Renaissance art.
-Catholic.org
Prayer: Lord, You comforted and measured Thomas; I pray that You do the same with me when I am confused and assailed by doubts.