Your codex just got schooled

A codex by definition is a book in the format of modern books, considered those with binding. But it seems that most codices come to us as epic works, historical documents and often marviously illuminated. Many codices are so magnificent they are named for the town or the library in which they have lived.

Nothing could be finer than the
codex seraphinianus, except well the Dresden Codex or the Book of Kells.

seudo-Seneca, and others from the British Library Catalogue

Codex Seraphinianus