Saint Matthias. Matthias was, according to the Acts of the Apostles, chosen by the apostles to replace Judas Iscariot following the latter's betrayal of Jesus and his subsequent death.
His calling as an apostle is unique, in that his appointment was not made personally by Jesus, who had already ascended into heaven, and it was also made before the descent of the Holy Spirit upon the early Church. There is no mention of a Matthias among the lists of disciples or followers of Jesus in the three synoptic gospels, but according to Acts, he had been with Jesus from his baptism by John until his Ascension.
In the days following, Peter proposed that the assembled disciples, who numbered about 120, nominate two men to replace Judas. They chose Joseph called Barsabas and Matthias.
Then they prayed, Thou, Lord, which knowest the hearts of all, shew whether of these two thou hast chosen, That he may take part of this ministry and apostleship, from which Judas by transgression fell, that he might go to his own place. Then they cast lots, and the lot fell to Matthias; so he was numbered with the eleven apostles.
No further information about Matthias is to be found in the canonical New Testament. Even his name is variable: the Syriac version of Eusebius calls him throughout not Matthias but Tolmai, not to be confused with Bartholomew, who was one of the twelve original Apostles; Clement of Alexandria refers