Liber Linteus
The Liber Linteus Zagrabiensis (Latin for "Linen Book of Zagreb", also known rarely as Liber Agramensis, "Book of Agram") is the longest Etruscan text and the only extant linen book (libri lintei), dated to the 3rd century BC, making it arguably the oldest extant European book. (The second longest Etruscan text, Tabula Capuana, also seems to be a ritual calendar.) Much of it is untranslated because of the lack of knowledge about the Etruscan language, though the words and phrases which can be understood indicate that the text is most likely a ritual calendar.