Matthew is a saint in Christianity because he was one of the twelve apostles of Jesus Christ. He is traditionally credited with writing the Gospel of Matthew, which is one of the four canonical Gospels in the New Testament. His dedication to spreading the teachings of Jesus and his martyrdom for his faith contributed to his recognition as a saint.

The Martyrdom of Saint Lawrence - Titian - was created in 1558.

The Martyrdom of Saint Ursula - Caravaggio - was created in 1610.

Saint Matthew's death by martyrdom earned him his saint hood by the Catholic Church. Saint Matthew was one of the 12 Apostles chosen by Jesus.

Saint Matthew was not made a saint by anyone; rather, he was one of the original twelve apostles chosen by Jesus. After his death, he was recognized as a saint for his role in spreading Christianity and his dedication to his faith.