Giovanni Antonio Magini (June 13, 1555 - February 11, 1617) was an Italian astronomer, astrologer, cartographer, and mathematician. Born in Padua, he completed his studies in philosophy in Bologna in 1579. In 1588 he was chosen over Galileo Galilei as the chair of mathematics at the University of Bologna after the death of Egnatio Danti. Magini was a prolific writer, putting forth theories of celestial motion (he was a supporter of a geocentric solar system), the use of quadrants in surveying and astronomy, and trigonometry. In 1608, Magini produced the first map of Italy to improve on that of Gastaldi: his meticulously researched and beautifully engraved 8-sheet Italia Nuova was hugely influential: upon its publication, Blaeu promptly copied it to produce his own wall map of Italy; the rest of the mapmaking establishment swiftly followed suit. Consequently, virtually every 17th century map of Italy can be identified as a derivative of Magini's monumental achievement. His atlas, Atlante geografico d’Italia, was published posthumously by his son in 1620. This work was intended to include maps of every Italian region with exact nomenclature and historical notes. He also served as court astrologer for the Duke of Mantua.