The Church of Jerusalem is the "Mother of all Churches" of all of Christendom, because it was in Jerusalem that the Church was established on the day of Pentecost with the descent of the Holy Spirit on the disciples of Jesus Christ. From Jerusalem the gospel of Christ was spread to the world. The Church of Jerusalem remains the custodian of many of the holy sites in Jerusalem and environs, sometimes jointly with Roman Catholic or Coptic or Armenian Christians, including the Church of the Holy Sepulchre in Jerusalem and the Church of the Nativity in Bethlehem.