This illustration is from our new book, See the Great American Eclipse of August 21, 2017. You can find the book at www.GreatAmericanEclipse.com/Store. Click this or any graphic on this page to enlarge.
Discovered by accident, this manuscript page provides graphical insight to astronomy in medieval times, before the Renaissance and the influence of Nicolaus Copernicus, Tycho de Brahe, Johannes Kepler, and Galileo. The intriguing page is from lecture notes on astronomy compiled by the monk Magister Wolfgang de Styria before the year 1490 at Melk Abbey in Austria.
This clock has a 400 year perpetual calendar, shows the equation of time, sidereal time, sun/moon rise and set, moon's phase and age, tides, solar/lunar eclipses, has a planisphere, tellurium, and full-featured orrery to Saturn with functional moons amongst other things.