Astrolabes from Medieval Europe

Book excerpt: This is the fourth set of studies in the Variorum series by David King, a leading authority on the history of Islamic astronomy and on medieval astronomical instruments. The first of the studies collected here deals with medieval instruments as historical sources. The following papers focus on individual astrolabes from the European Middle Ages and early Renaissance that are of singular historical importance and look at the origins of the simple universal horary quadrant and the complicated universal horary dial (navicula). The collection concludes with a list of all known medieval European astrolabes.