The nineteenth century saw an Aristotelian "renaissance'. A movement of mainly German origin, its protagonists produced a series of critical editions of Aristotle 's works accompanied by commentaries and philological and conceptual analyses.² A leading role in the revival was played by the Academy of Berlin, which supported publication of the critical edition of Aristotle's works, the first two volumes of which were edited by Bekker (1831), while 1870 saw publication of Index Aristotelicus edited by Bonitz. In two years, from 1847 to 1849, two editions of Aristotle's Metaphysics were also published, one edited by Schwegler (1847-48), the other by Bonitz (1848-49).