The thirteenth century saw such a proliferation of new encyclopedic texts that more than one scholar has called it the “century of the encyclopedias.” Variously referred to as a speculum, thesaurus, or imago mundi—the term encyclopedia was not commonly applied to such books until the eighteenth century—these texts were organized in such a way that a reader could easily locate a collection of authoritative statements on any given topic. Because they reproduced, rather than simply summarized, parts of prior texts, these compilations became libraries in miniature.