Saint Dismas is the traditional name given to the "good thief" (criminal) who was crucified at the side of Jesus Christ. Dismas stood up for Jesus when He was insulted by the other criminal (traditionally known as Gestas) and asked that Jesus remember him when he went into his kingdom. Christ promised Dismas passage to paradise based on his faith.
In Catholic tradition Dismas is believed to have had a previous meeting with our Lord on the Holy Family's flight to Egypt. It is said that Dismas was very sick and the Blessed Virgin bathed him in the same water as the Holy Child and Dismas was healed. This story may be a foreshadowing of how Jesus would heal Dismas' soul before his death so that he could enjoy eternal life.
Dismas is one of the Penitent Saints.