The central tower is composed of three levels. On the bottom, figures of the Four Seasons surround a mechanical astrolabe, which indicates the location of the planets according to Copernicus, and is surrounded by the signs of the zodiac. Above this is a globe, with painted figures of the Church and the Antichrist confronting each other. This mechanism displays the phases of the moon. Above this are two levels of animated mechanical figures, above that a figure of Christ and the four Evangelists, under a dome formed by crossed arches.