The growth of libraries slowly followed the development of monastic orders. The systematic care and use of books began with the precepts of S. Benedict in the sixth century, followed by similar rules in other brotherhoods. At the same time secular libraries and library buildings were devastated by the barbarians, while the Arabs, who developed large libraries, appeared to have housed them in mosques, so that library building science slumbered through the Dark Ages.
In the sixth and seventh centuries learning followed the first steps of Christianity into the British Isles. The earliest English “library movement” began in the monasteries of Ireland and Great Britain.
From that era onward, libraries all over Christianized Europe grew with the prosperity of religious brotherhoods. Of progress toward building, however, there is little record until the Cistercians moved theirs from the cloisters to other rooms in their monasteries, although some use of cloisters elsewhere lingered until the beginning of the seventeenth century. These rooms were at first directly over the cloisters, where alcoves first appeared, on the window side only. Still later libraries were assigned to the upper stories of separate buildings, the first put to this use since the time of the Cæsars in Rome.
These first mediæval libraries, of which several pictures are preserved, send to us the precedent of ample and aptly applied daylight admitted through long windows directly into each alcove. The exteriors remind us of our stack rooms. This arrangement of library rooms passed by imitation in the fourteenth and fifteenth centuries from the monasteries to the colleges, and still survives in the older libraries of Oxford and Cambridge,—for instance, Merton College, a long, narrow room with bookcases between the windows, at right angles with the walls, forming well-lighted alcoves.
All of the earliest library rooms were long and narrow. Clark has preserved the measurements of several thus:—
A.D. 1289. Zutphen (Holland): A solid building separated from others (in case of fire): 120 feet long, 36 feet broad: 19 uniform windows east and west, “that plenty of daylight might fall upon the desks and fill the whole length and breadth of the library.”
A.D. 1422. The Franciscan House in London, “Christ’s Hospital” (the first building in England built expressly for a library?) founded by Sir Richard Whittington; 129 feet long by 31 feet broad, with 28 desks and 28 double settles.
A.D. 1508. At Canterbury: the library over the Prior’s Chapel was 60 feet long by 20 feet broad, and had 16 bookcases, each 4 shelves high.