The Church attempts to preserve historic [[Calvinism]] within a [[Presbyterian]] structure. OPC was originally called the '''Presbyterian Church of America,''' but a legal issue with Presbyterian Church in the U.S.A caused them to change their name. | The Church attempts to preserve historic [[Calvinism]] within a [[Presbyterian]] structure. OPC was originally called the '''Presbyterian Church of America,''' but a legal issue with Presbyterian Church in the U.S.A caused them to change their name. |