After the Resurrection of our Lord, he was blessed by being one of the few apostles who witnessed the appearance of the risen Saviour on the sea of Galilee (John 21:2). Following the Ascension the tradition is that he preached the Gospel in Greater Armenia, and it was there that he was martyred by being flayed, which means that while he was still alive, his skin was torn from his body. The Armenians honor him as the apostle of their nation.
His relics were brought eventually to Rome to a small island in the middle of the Tiber, where there is a basilica and hospital.
O Almighty and everlasting God, who didst give to thine apostle St. Bartholomew grace truly to believe and to preach thy Word: Grant, we beseech thee, unto thy Church to love what he believed and to preach what he taught; through Jesus Christ our Lord, who liveth and reigneth with thee and the Holy Spirit, one God, for ever and ever. Amen.
Tomb of St. Bartholomew, Tiber Island