Christian Orthodoxy is a short summary of the central principles of the Christian faith agreed to by The Church through the 4th Century in PDF form. It contains the Apostle's Creed, Nicene Creed, and the 2nd Nicene Creed (sometimes called the Athanasian Creed, although Athanasis did not write it). In addition, there is a short summary of why the creeds were written and a summary of the common elements of confessions that have been accepted in subsequent centuries.
This resource is often used to demonstrate what we have in common across the Christian faith. Also, it is sometimes useful to illustrate places where non-Christian faiths differ in their beliefs. We build unity in community where we have commonality, although we can never compromise the orthodox principles upon which our faith is built.