Regiomontanus

Regiomontanus
18th-century portrait (Iohannes de Regio Monte dictus alias Müllerus)
Born	6 June 1436 Königsberg, Electorate of Saxony, Holy Roman Empire
Died	6 July 1476(1476-07-06) (aged 40) Rome, Papal States
Nationality	German
Education	University of Leipzig (no degree) University of Vienna (B.A., 1452; M.A., 1457)
Known for	Founding the world's first scientific printing press Publishing the first printed astronomical textbook (1472) and the first trigonometric tables (posthum., 1490) Tangent tables
Scientific career
Fields	Mathematics (trigonometry), astronomy, astrology
Institutions	Universitas Istropolitana
Academic advisors	Georg von Peuerbach Basilios Bessarion
Notable students	Domenico Novara da Ferrara

Johannes Müller von Königsberg (6 June 1436 – 6 July 1476^[1]), better known as Regiomontanus (/ˌriːdʒioʊmɒnˈteɪnəs/), was a mathematician, astrologer and astronomer of the German Renaissance, active in Vienna, Buda and Nuremberg. His contributions were instrumental in the development of Copernican heliocentrism in the decades following his death.

Regiomontanus wrote under the Latinized name of Ioannes de Monteregio (or Monte Regio; Regio Monte); the toponym Regiomontanus was first used by Philipp Melanchthon in 1534. He is named after Königsberg in Lower Franconia, not the larger Königsberg (modern Kaliningrad) in Prussia.