If you know nothing else about medieval European illuminated manuscripts, you surely know the Book of Kells.

𝘖𝘯𝘦 𝘰𝘧 𝘐𝘳𝘦𝘭𝘢𝘯𝘥’𝘴 𝘨𝘳𝘦𝘢𝘵𝘦𝘴𝘵 𝘤𝘶𝘭𝘵𝘶𝘳𝘢𝘭 𝘵𝘳𝘦𝘢𝘴𝘶𝘳𝘦𝘴. 𝘐𝘵 𝘪𝘴 𝘴𝘦𝘵 𝘢𝘱𝘢𝘳𝘵 𝘧𝘳𝘰𝘮 𝘰𝘵𝘩𝘦𝘳 𝘮𝘢𝘯𝘶𝘴𝘤𝘳𝘪𝘱𝘵𝘴 𝘰𝘧 𝘵𝘩𝘦 𝘴𝘢𝘮𝘦 𝘱𝘦𝘳𝘪𝘰𝘥 𝘣𝘺 𝘵𝘩𝘦 𝘲𝘶𝘢𝘭𝘪𝘵𝘺 𝘰𝘧 𝘪𝘵𝘴 𝘢𝘳𝘵𝘸𝘰𝘳𝘬 𝘢𝘯𝘥 𝘵𝘩𝘦 𝘴𝘩𝘦𝘦𝘳 𝘯𝘶𝘮𝘣𝘦𝘳 𝘰𝘧 𝘪𝘭𝘭𝘶𝘴𝘵𝘳𝘢𝘵𝘪𝘰𝘯𝘴 𝘵𝘩𝘢𝘵 𝘳𝘶𝘯 𝘵𝘩𝘳𝘰𝘶𝘨𝘩𝘰𝘶𝘵 𝘵𝘩𝘦 680 𝘱𝘢𝘨𝘦𝘴 𝘰𝘧 𝘵𝘩𝘦 𝘣𝘰𝘰𝘬.

A digitization of it is now entirely viewable at the online collections of the Trinity College Library.

https://www.openculture.com/2024/09/the-medieval-masterpiece-the-book-of-kells-is-now-digitized-and-available-online.html