- As Brethren in Christ, we trace our beginnings from a group known as the River Brethren, which originated about 1778 in Lancaster County, Pennsylvania. Our forbearers bore witness to the beliefs which set them apart by formulating a Confession of Faith. The first confessional statement of about 1780 and others that followed reflect the Pietistic and Anabaptist influences which have shaped our doctrinal understandings.www.bic-church.org