The definition of "copyright" is the right to copy things like art, books, and music. The very first copyright issue was in the year 561. There was an argument about the owner of a copy of an Irish manuscript and the King gave the judgement “To every cow belongs her calf, therefore to every book belongs its copy”. This means every copy of a book belonged to the owner of the original book. The rules have changed a bit since then!
The Balance. (2020). Copyright: What is it? Retrieved from https://www.thebalancesmb.com/copyright-definition-2948254
Royal Irish Academy. (n.d.) The Cathac. Retrieved from https://web.archive.org/web/20140702153948/http://www.ria.ie/Library/Special-Collections/Manuscripts/Cathach.aspx
Suehie, R. (2011). The story of St. Columba: A modern copyright battle in sixth century Ireland. Retrieved from https://opensource.com/law/11/6/story-st-columba-modern-copyright-battle-sixth-century-ireland
Thank you Anastasia Kolchina