Woodcut of two signs of the zodiac with text which discusses the appearance of comets in each of these constellations and the terrible events that happen afterwards. Illustration from 'Compilatio...de astrorum scientia' (Compilation of knowledge of stars) by Leopoldus, Duke of Austria, published in Augsburg in 1489. Leopoldus was an Austrian astronomer who lived in the middle or second half of the thirteenth century. The 'Compilatio' was a collection of Latin translations from Arabic astronomical works and was divided into ten books. It is one of the earliest astronomical treatises in a common language and is embellished with numerous woodcuts of horoscopes, constellations and planets.
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