 The Byzantine world produced manuscripts in its own style, versions of which spread to other Orthodox and Eastern Christian areas.The Muslim World and in particular the Iberian Peninsula, with their traditions of literacy uninterrupted by the Middle Ages, were instrumental in delivering ancient classic works to the growing intellectual circles and universities of Western Europe all through the 12th century, as books were produced there in large numbers and on paper for the first time in Europe, and with them full treatises on the sciences, especially astrology and medicine where illumination was required to have profuse and accurate representations with the text.The Gothic period, which generally saw an increase in the production of these artifacts, also saw more secular works such as chronicles and works of literature illuminated.