How to read a medieval astronomical calendar
What do all those columns of letters and numbers mean? This post explains how to make sense of all the information.
How to read a medieval astronomical calendar
Leap years and astrolabes
How did an Italian astrolabe end up on the New Zealand passport?
String Theory – Medieval-style
How to cast a medieval horoscope
What’s the difference between an astrolabe and an equatorium?
My weekend as a medieval craftsman