The Vienna Dioscurides or Vienna Dioscorides is an early 6th century illuminated manuscript of De Materia Medica by Dioscorides in Greek. It is an important and rare example of a late antique scientific text. The 491 vellum folios measure 37 by 30 cm and contain more than 400 pictures of animals and plants, most done in a naturalistic style. In addition to the text by Dioscorides, the manuscript has appended to it the Carmen de herbis attributed to Rufus, a paraphrase of an ornithological treatise by a certain Dionysius, usually identified with Dionysius of Philadelphia, and a paraphrase of Nicander's treatise on the treatment of snake bites. The manuscript was created in about 515 and was made for the Byzantine princess Juliana Anicia, the daughter of Emperor Anicius Olybrius. Although it was originally created as a luxury copy, there is some indication that in later centuries it was used daily as a hospital textbook. It includes some annotations in Arabic. The manuscript was discover