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The Ogham alphabet was popular among the ancient Celts and Picts who lived in Ireland and Great Britain in the IV — X. Along with Ogham,  Latin  0041–007A was also in use, so there is a theory that the Ogham script was in reality a secret writing.

It went from left to right or from bottom to top, and the words were not separated from each other. The beginning of the text used to be marked with the sign ᚛ , and at the end you could see ᚜ .

Most of the monuments with this alphabet date back to the V—VI centuries. Many scientists believe that this writing appeared under the influence of the Latin alphabet or the Germanic Futhark script.