Jakob Christmann (born November 1554 in Johannisberg ( Rheingau), Geisenheim – 16 June 1613 in

Heidelberg Heidelberg (; Palatine German language, Palatine German: ''Heidlberg'') is a city in the States of Germany, German state of Baden-Württemberg, situated on the river Neckar in south-west Germany. As of the 2016 census, its population was 159,914 ...

) was a German Orientalist who also studied problems of

astronomy Astronomy () is a natural science that studies celestial objects and phenomena. It uses mathematics, physics, and chemistry in order to explain their origin and evolution. Objects of interest include planets, moons, stars, nebulae, g ...

Life

Christmann, a

Jew Jews ( he, יְהוּדִים, , ) or Jewish people are an ethnoreligious group and nation originating from the Israelites Israelite origins and kingdom: "The first act in the long drama of Jewish history is the age of the Israelites""T ...

who converted before 1578 to

Christianity Christianity is an Abrahamic monotheistic religion based on the life and teachings of Jesus of Nazareth. It is the world's largest and most widespread religion with roughly 2.38 billion followers representing one-third of the global pop ...

, studied Orientalistics at the University of Heidelberg's Collegium Sapientiae and became teacher at the ''Dionysianum''. He followed

humanist Humanism is a philosophical stance that emphasizes the individual and social potential and agency of human beings. It considers human beings the starting point for serious moral and philosophical inquiry. The meaning of the term "human ...

Thomas Erastus Thomas Erastus (original surname Lüber, Lieber, or Liebler; 7 September 152431 December 1583) was a Swiss physician and Calvinist theologian. He wrote 100 theses (later reduced to 75) in which he argued that the sins committed by Christians sho ...

Basel , french: link=no, Bâlois(e), it, Basilese , neighboring_municipalities= Allschwil (BL), Hégenheim (FR-68), Binningen (BL), Birsfelden (BL), Bottmingen (BL), Huningue (FR-68), Münchenstein (BL), Muttenz (BL), Reinach (BL), Riehen (BS ...

and continued his study tour in Breslau,

Vienna en, Viennese , iso_code = AT-9 , registration_plate = W , postal_code_type = Postal code , postal_code = , timezone = CET , utc_offset = +1 , timezone_DST ...

and

Prague Prague ( ; cs, Praha ; german: Prag, ; la, Praga) is the capital and List of cities in the Czech Republic, largest city in the Czech Republic, and the historical capital of Bohemia. On the Vltava river, Prague is home to about 1.3 milli ...

. In 1578,

Pfalzgraf A count palatine (Latin ''comes palatinus''), also count of the palace or palsgrave (from German ''Pfalzgraf''), was originally an official attached to a royal or imperial palace or household and later a nobleman of a rank above that of an ord ...

John Casimir founded the Reformed Casmirianum at

Neustadt an der Haardt Neustadt (German for ''new town'' or ''new city'') may refer to: Places * Neustadt (urban district) Czech Republic *Neustadt an der Mettau, Nové Město nad Metují *Neustadt an der Tafelfichte, Nové Město pod Smrkem *Nové Město na Mora ...

. Christmann joined the Casimirianum faculty in 1582 and dedicated his

Arabic language Arabic (, ' ; , ' or ) is a Semitic language spoken primarily across the Arab world.Semitic languages: an international handbook / edited by Stefan Weninger; in collaboration with Geoffrey Khan, Michael P. Streck, Janet C. E.Watson; Walte ...

grammar In linguistics, the grammar of a natural language is its set of structural constraints on speakers' or writers' composition of clauses, phrases, and words. The term can also refer to the study of such constraints, a field that includes domain ...

, ''Alphabetum arabicum'', to his colleagues there. After the return of the Reformed faith to the

Electorate of the Palatinate The Electoral Palatinate (german: Kurpfalz) or the Palatinate (), officially the Electorate of the Palatinate (), was a state that was part of the Holy Roman Empire. The electorate had its origins under the rulership of the Counts Palatine of ...

, Christmann returned to Heidelberg to serve on the faculty of the Collegium Sapientiae in 1584. After some internal debate about the location of the chair, Christmann was appointed professor of

Hebrew Hebrew (; ; ) is a Northwest Semitic language of the Afroasiatic language family. Historically, it is one of the spoken languages of the Israelites and their longest-surviving descendants, the Jews and Samaritans. It was largely preserved ...

at the university in 1585. He compiled a catalog of the manuscripts of

Guillaume Postel Guillaume Postel (25 March 1510 – 6 September 1581) was a French linguist, astronomer, Christian Kabbalist, diplomat, polyglot, professor, religious universalist, and writer. Born in the village of Barenton in Normandy, Postel made his w ...

(1510–1581), located since 1551 at Heidelberg Castle. In 1590 he published a Latin translation of the astronomy of

Al-Farghani Abū al-ʿAbbās Aḥmad ibn Muḥammad ibn Kathīr al-Farghānī ( ar, أبو العبّاس أحمد بن محمد بن كثير الفرغاني 798/800/805–870), also known as Alfraganus in the West, was an astronomer in the Abbasid court ...

. In 1609 at the urging of Elector Frederick IV, he was appointed Europe's second professor for the

Arabic Arabic (, ' ; , ' or ) is a Semitic language spoken primarily across the Arab world.Semitic languages: an international handbook / edited by Stefan Weninger; in collaboration with Geoffrey Khan, Michael P. Streck, Janet C. E.Watson; Walter ...

language.

Copernicus manuscript

De revolutionibus ''De revolutionibus orbium coelestium'' (English translation: ''On the Revolutions of the Heavenly Spheres'') is the seminal work on the heliocentric theory of the astronomer Nicolaus Copernicus (1473–1543) of the Polish Renaissance. The book ...

manuscript of

Nicolaus Copernicus Nicolaus Copernicus (; pl, Mikołaj Kopernik; gml, Niklas Koppernigk, german: Nikolaus Kopernikus; 19 February 1473 – 24 May 1543) was a Renaissance polymath, active as a mathematician, astronomer, and Catholic canon, who formulated ...

passed via Rheticus to others and was marked on 19 December 1603 by Christmann with ''Nicolai Copernick Canonici Varmiensis in Borussia Germaniae mathematici …'' ("of Canon Nicolaus Copernick from

Warmia Warmia ( pl, Warmia; Latin: ''Varmia'', ''Warmia''; ; Warmian: ''Warńija''; lt, Varmė; Old Prussian: ''Wārmi'') is both a historical and an ethnographic region in northern Poland, forming part of historical Prussia. Its historic capital ...

Prussia Prussia, , Old Prussian: ''Prūsa'' or ''Prūsija'' was a German state on the southeast coast of the Baltic Sea. It formed the German Empire under Prussian rule when it united the German states in 1871. It was ''de facto'' dissolved by an ...

of Germany, of the mathematician …").Venerabilis et eximii iuris utriusque doctoris, Dni Nicolai Copernick Canonici Varmiensis in Borussia Germaniae mathematici celeberimi opus de revolutionibus coelestibus propria manu exparatum et haectenus in biblioteca Georgii Ioachimii Rhetici item Valentini Othonis conferuatum, ad usum studii mathematici procurauit M. Iakobus Christmannus Decanus Facultatis artium, anno 1603, die 19 Decembris Since 1953 it is located in Cracow in the

Jagiellonian library Jagiellonian Library ( pl, Biblioteka Jagiellońska, popular nickname ''Jagiellonka'') is the library of the Jagiellonian University in Kraków and with almost 6.7 million volumes, one of the largest libraries in Poland, serving as a public libra ...

(Signatur: Ms. BJ. 10 000) and is accessible online.

References

Work

* ''Alphabetum Arabicum cum isagoge Arabice legendi ac scribendi'', Neustadt 1582 * ''Muhammedis Alfraganii Arabis chronologia et astronomiae elementa'', Frankfurt 1590

External links

Jakob Christmann
in

Dictionary of Scientific Biography The ''Dictionary of Scientific Biography'' is a scholarly reference work that was published from 1970 through 1980 by publisher Charles Scribner's Sons, with main editor the science historian Charles Gillispie, from Princeton University. It consi ...

Letter of Christmann to Kepler, in Latin
* http://histmath-heidelberg.de/homo-heid/christmann.htm

(Frankfurt, 1615), pp. 518–22] {{DEFAULTSORT:Christmann, Jakob 1554 births 1613 deaths Converts to Protestantism from Judaism 16th-century German astronomers 16th-century German Jews German orientalists Christian Hebraists Heidelberg University alumni Academic staff of the Collegium Sapientiae (Heidelberg) Academic staff of Heidelberg University German male non-fiction writers