Ogham is the oldest known form of written Irish. Origins of OghamPoems written in OghamAlphabet named after treesNew age beliefsIrish art It consists of an alphabet made of 20 characters named after types of trees. Ogham is at least 1,700 years old Inscriptions in Ogham – pronounced o-am – are thought to date back to … Continue reading Ogham – ancient Irish written language