Before the invention of printing, most books of the Middle Ages had been produced in monasteries, where the monks worked arduously at the task of making copies of the Bible and other sacred writings. In the scriptoria, quiet rooms set aside for this purpose, the scribes received folded vellum sheets, marked out the margins and guide lines with a stylus, then copied the text in careful letters. Some parts of the manuscript called for special distinction: the opening lines of the text, the initial letters of sections, the title and colophon. These parts, lettered in red, were called "rubrics," from the Latin ruber, "red." Sometimes they were filled in by a special monk, the rubricator. Pages were then sent on to other specialists for decoration and binding. Monastic scriptoria did not suddenly cease to exist after Gutenburg. Manuscripts continued to be hand-lettered during the fifteenth century, particularly for Psalters and compilations of sacred music for which early printing techniques were not yet well developed.[AHB]