The volume presents the 21 most important encyclopedia and lexicon articles from the 16th to 19th centuries on the subject of 'memory, mnemonics and the art of memoria', complete with commentaries, translations (from Latin, Italian and Spanish), a detailed bibliography and an afterword discussing the relations between early modern age mnemonics and the idea of the encyclopedia. It is the first of a planned series presenting the most important relevant material from Classical antiquity to the end of the early modern age in multilingual, annotated source editions, source indexes and research bibliographies, thus enhancing its accessibility for further academic research in a convenient and reliable form.