Ingolstadt is an independent city on the Danube, in Upper Bavaria, Germany, with 142,308 inhabitants. Around half a million people live in the metropolitan area. Ingolstadt is the second largest city
Petrus Apianus, also known as Peter Apian, Peter Bennewitz, and Peter Bienewitz, was a German humanist, known for his works in mathematics, astronomy and cartography. His work on "cosmography", the fi
Apianus on a 16th-century engraving by Theodor de Bry
A volvelle for lunar eclipses from Astronomicum Caesareum (1540)