James led the Council at Jerusalem in Acts 15. He helped forge the decision concerning Gentile believers being allowed into the Church as equals to Jewish believers.

A prayer:

Grant, O God, that, following the example of your apostle James the Just, kinsman of our Lord, your Church may give itself continually to prayer and to the reconciliation of all who are at variance and enmity; though Jesus Christ our Lord, who lives and reigns with you and the Holy Spirit, on God, now and forever. Amen.