Thomas the Apostle, also called Doubting Thomas or Didymus (meaning "Twin," ) was one of the Twelve Apostles of Jesus.

He is best known for questioning Jesus' resurrection when first told of it, then proclaiming "My Lord and my God" on seeing Jesus in John 20:28.

He was perhaps the only Apostle who went outside the Roman Empire to preach the Gospel. He is also believed to have crossed the largest area, which includes the Parthian Empire and India.

Thomas speaks in the Gospel of John. In John 11:16, when Lazarus has just died, the apostles do not wish to go back to Judea, where Jesus' fellow Jews had attempted to stone him to death.
Thomas says bravely (or perhaps sarcastically): "Let us also go, that we may die with him" (NIV).