Renaissance in Poland late 18th century. The period of Polish Renaissance, supportive of intellectual pursuits, produced many outstanding artists and scientists. Among them were Nicolaus Copernicus who in his "De revolutionibus orbium coelestium" presented the heliocentric theory of the universe, Maciej of Miechów, author of "Tractatus de duabus Sarmatis..." – the most accurate up to date geographical and ethnographical account of Eastern Europe; Bernard Wapowski, a cartographer whose maps of that region appeared in Ptolemy's "Geography"; Marcin Kromer who in his "De origine et rebus gestis Polonorum libri..." described both the history and geography of Poland; Andrzej Frycz Modrzewski, a philosopher concerned with
Nicolaus Copernicus several Kraków astronomers with whom he collaborated in 1515–30 in observing eclipses. Tycho Brahe would include a fragment from the "Commentariolus" in his own treatise, "Astronomiae instauratae progymnasmata", published in Prague in 1602, based on a manuscript that he had received from the Bohemian physician and astronomer Tadeáš Hájek, a friend of Rheticus. The "Commentariolus" would appear complete in print for the first time only in 1878. In 1510 or 1512 Copernicus moved to Frombork, a town to the northwest at the Vistula Lagoon on the Baltic Sea coast. There, in April 1512, he participated in the election of Fabian