{{summary | text=The Armenian Apostolic Church (sometimes called the Armenian Orthodox Church) is the world's oldest national church having been founded in 301. The Apostolic Church separated from the then-still-united Roman Catholic/Byzantine Orthodox church in 451, after the [[Council of Chalcedon]] over the issue of the [[nature of Christ]]. It is in communion with the other [[Eastern Oriental]] churches including the [[Coptic Church]].}}
[[Image:DCP 4427.jpg|thumb|The main [[church building]] in [[Echmiadzin]].]]