in following Cicero's categorization, he defined it as a part of Prudence and recommended its use to meditate on the virtues and to improve one's piety. In scholasticism artificial memory came to be used as a method for recollecting the whole universe and the roads to Heaven and Hell. The Dominicans were particularly important in promoting its uses, see for example Cosmos Rossellius. The Jesuit missionary Matteo Ricci - who from 1582 until his death in 1610, worked to introduce Christianity to China - described the system of places and images in his work, A Treatise On Mnemonics. However, he advanced it only as an aid to passing examinations (a kind of rote memorization) rather than as a means of new composition, though it had traditionally been taught, both in dialectics and in rhetoric, as a tool for such composition or 'invention'. Ricci was apparently trying to gain favour with the Chinese imperial service, which required a notoriously difficult entry examination. Perhaps following the example of Metrodorus of Scepsis, vaguely described in Quintilian's Institutio oratoria, Giordano Bruno, a defrocked Dominican, used a variation of the art in which the trained memory was based in some fashion upon the zodiac. Apparently, his elaborate method was also based in part on the combinatoric concentric circles of Ramon Llull, in part upon schematic diagrams in keeping with medieval Ars Notoria traditions, in part upon groups of words and images associated with late antique Hermeticism, and in part upon the classical architectural mnemonic. According to one influential interpretation, his memory system was intended to fill the mind of the practitioner with images representing all knowledge of the world, and was to be used, in a magical sense, as an avenue to reach the intelligible world beyond appearances, and thus enable one to powerfully influence events in the real world. Such enthusiastic claims for the encyclopedic reach of the art of memory are a feature of the early Renaissance, but the art also gave rise to better-known developments in logic and scientific method during the sixteenth and seventeenth centuries. However, this transition was not without its difficulties, and during this period the belief in the effectiveness of the older methods of memory training (to say nothing of the esteem in which its practitioners were held) steadily became occluded. In 1442, a huge controversy over the method broke out in England when the Puritans attacked the