The Declaration and Address was written by Thomas Campbell in 1809. It was first published in Washington, Pennsylvania in 1809. It was the founding document for the Christian Association of Washington, a short lived religious movement of the 19th century. The Christian Association ultimately led to what is now known as the Restoration Movement. In many ways, Thomas Campbell was before his time. He had an ecumenical spirit long before the ecumenical movement began. The Declaration and Address is a testimony to his appeal for Christian unity.