:'''''Canon''''' ''redirects here. For other uses of the term Canon, see [[Canon (disambiguation)]].''
A '''canon''' is a structured [[hymn]] used in a number of [[Eastern Orthodoxy|Eastern Orthodox]] services. It consists of nine ''odes'', sometimes called ''canticles'' or ''songs'' depending on the translation, based on compositions (also called odes) found in the [[Bible]] and, with one exception, the [[Old Testament]].