Cosmographia Petri Apiani, per Gemmam Frisium ... iam demum ab omnibus vindicata mendis, ac nonnullis quoque locis aucta ...

A detailed engraving depicts a celestial sphere diagram mounted on a stand, showing the celestial poles, the equator, the tropics (Cancer and Capricorn), the zodiacal band, and the horizon. The diagram is labeled with various astronomical terms including 'Zenith', 'Arctic Pole', 'Equator', 'Movable Meridian', and 'Nadir'. The stand is supported by two ornate pillars, and the base is labeled 'MERIDIAN LINE'.