Alessandro
Piccolomini 1508-1578
He was born
in Sienna on June 13th 1508 , he was titular Archbishop of Padua and made
observations with an instrument like a quadrant with a radius of at least 4
feet.
Among his many books was DE LE STELLE FISSE LIBRO UNO in 1540
containing woodcut star maps of Ptolemy’s constellations , without the mythological
fugures, and the Sun being indicated by letters of the Roman alphabet.
In 1578
he advocated the reform of the calendar, this would of course be done by Pope Gregory XIII in 1582. Piccolomini died in Sienna in 1578.
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