Christopher Clavius

1538 - 1612

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Christopher Clavius, (25 March 1538 – 6 February 1612) was a Jesuit German mathematician, head of mathematicians at the Collegio Romano, and astronomer who was a member of the Vatican commission that accepted the proposed calendar invented by Aloysius Lilius, that is known as the Gregorian calendar. Clavius would later write defences and an explanation of the reformed calendar, including an emphatic acknowledgement of Lilius' work. Read more on Wikipedia

Since 2007, the English Wikipedia page of Christopher Clavius has received more than 177,098 page views. His biography is available in 37 different languages on Wikipedia (up from 35 in 2019). Christopher Clavius is the 122nd most popular mathematician (down from 116th in 2019), the 749th most popular biography from Germany (down from 675th in 2019) and the 16th most popular German Mathematician.

Christopher Clavius is most famous for his work on the Gregorian calendar.

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Among mathematicians, Christopher Clavius ranks 122 out of 1,004Before him are Meton of Athens, Theon of Alexandria, Leonid Kantorovich, Josef Stefan, Nicomachus, and Alexis Clairaut. After him are Zu Chongzhi, Hermann Weyl, Herbert A. Hauptman, Marian Rejewski, Ferdinand von Lindemann, and Liu Hui.

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Among people born in 1538, Christopher Clavius ranks 2Before him is Charles Borromeo. After him are Caesar Baronius, Maeda Toshiie, Guglielmo Gonzaga, Duke of Mantua, Matija Gubec, Diane de France, Giovanni Battista Guarini, Infanta Maria of Guimarães, Louis of Nassau, Hōjō Ujimasa, and Ashikaga Yoshihide. Among people deceased in 1612, Christopher Clavius ranks 6Before him are Rudolf II, Holy Roman Emperor, Sasaki Kojirō, Vasili IV of Russia, Giovanni Gabrieli, and Federico Barocci. After him are Vincenzo Gonzaga, Duke of Mantua, Anne Catherine of Brandenburg, Karin Månsdotter, Henry Frederick, Prince of Wales, Hans Leo Hassler, and Francesco IV Gonzaga, Duke of Mantua.

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In Germany

Among people born in Germany, Christopher Clavius ranks 749 out of 7,253Before him are David Strauss (1808), Günter Schabowski (1929), Erich Priebke (1913), Maria Barbara Bach (1684), Johann Martin Schleyer (1831), and Arthur Nebe (1894). After him are Nikolaus Harnoncourt (1929), Frederick I, Elector of Brandenburg (1371), Maria Anna of Bavaria (1551), Wilhelm Hauff (1802), Reinhard Gehlen (1902), and Simon Marius (1573).


Among mathematicians born in Germany, Christopher Clavius ranks 16Before him are Ludolph van Ceulen (1540), Richard Dedekind (1831), Alexander Grothendieck (1928), Regiomontanus (1436), Felix Klein (1849), and Carl Gustav Jacob Jacobi (1804). After him are Hermann Weyl (1885), Ferdinand von Lindemann (1852), Hermann of Reichenau (1013), Andrew Wiles (1953), Johannes Trithemius (1462), and Robert Aumann (1930).