Communion and Liberation is an ecclesial movement whose purpose is the education to Christian maturity of its adherents and collaboration in the mission of the Church in all the spheres of contemporary life. It began in Italy in 1954 when Fr Luigi Giussani established a Christian presence in Berchet high school in Milan with a group called Gioventù Studentesca (Student Youth), GS for short. The current name of the movement, Communion and Liberation (CL), appeared for the first time in 1969. It synthesizes the conviction that the Christian event, lived in communion, is the foundation of the authentic liberation of man. Communion and Liberation is today present in about seventy countries throughout the world. There is no type of membership card, but only the free participation of persons. The basic instrument for the formation of adherents is weekly catechesis, called “School of Community.” The official magazine of the Movement is the international monthly, Traces – Litterae Communionis