A depiction of Kircher's ideal of musical harmony: 'The Harmony of the Birth of the World' (Harmonia Nascentis Mundi), represented by a cosmic organ with six registers corresponding to the days of creation. The legend "Sic ludit in orbe terrarum aeterna Dei Sapientia"  (thus plays the wisdom of the everlasting God in the earthly orb) appears under the keyboard. (St Andrews copy r17f ML3805.K5M8)