Who was St Thomas the Apostle?

Thomas the Apostle (called Didymus which means "the twin") was one of the Twelve Apostles of Jesus Christ, according to the New Testament. He is informally called doubting Thomas because of his unwillingness to believe that the other Apostles had seen their risen Lord on the first Easter Sunday. Eight days later, on Christ's second apparition, Thomas was furnished with the evidence he had demanded - seeing in Christ's hands the point of the nails and putting his fingers in the place of the nails and his hand into His side. At this, St. Thomas became convinced of the truth of the Resurrection and exclaimed: "My Lord and My God," thus making a public Profession of Faith in the Divinity of Jesus.
 
Traditionally, he is said to have travelled outside the Roman Empire to preach the Gospel, travelling as far as India. According to tradition, he reached Muziris, India in AD 52 and baptized several people, founding what today are known as Saint Thomas Christians or Nasranis. His feast day is July 3rd and he is the patron of architects.