Bonfini, Pietro Ranzano, Bartolomeo Fonzio, and Francesco Bandini spent many years in Matthias's court. This circle of educated men introduced the ideas of Neoplatonism to Hungary. Like all intellectuals of his age, Matthias was convinced that the movements and combinations of the stars and planets exercised influence on individuals' life and on the history of nations. Galeotto Marzio described him as "king and astrologer", and Antonio Bonfini said Matthias "never did anything without consulting the stars". Upon his request, the famous astronomers of the age, Johannes Regiomontanus and Marcin Bylica, set up an observatory in Buda and installed it with astrolabes and celestial globes. Regiomontanus dedicated his book on navigation that was used by Christopher Columbus to Matthias. Other important figures of Hungarian Renaissance include Bálint Balassi (poet), Sebestyén Tinódi Lantos (poet), Bálint Bakfark (composer and lutenist), and Master MS (fresco painter). Renaissance in the Low Countries Culture in the Netherlands at the end of the 15th century was influenced by the Italian Renaissance through trade via Bruges, which made Flanders wealthy. Its nobles commissioned artists who became known across Europe. In science, the anatomist Andreas Vesalius led the way; in cartography, Gerardus Mercator's map assisted explorers and navigators. In art, Dutch and Flemish Renaissance painting ranged from the strange work of Hieronymus Bosch to the everyday life depictions of Pieter Brueghel the Elder. Northern Europe The Renaissance in Northern Europe has been termed the "Northern Renaissance". While Renaissance ideas were moving north from Italy, there was a simultaneous southward spread of some areas of innovation, particularly in music. The music of the 15th-century Burgundian School defined the beginning of the Renaissance in music, and the polyphony of the Netherlanders, as it moved with the musicians themselves into Italy, formed the core of the first true international style in music since the standardization of Gregorian Chant in the 9th century. The culmination of the Netherlandish school was in the music of the Italian composer Palestrina. At the end of the 16th century Italy again became a center of musical innovation, with the development of the polychoral style of the Venetian School, which spread northward into Germany around 1600. The paintings of the Italian Renaissance differed from those of the Northern Renaissance. Italian Renaissance artists were among the first to paint secular scenes, breaking away from the purely religious art of medieval painters. Northern Renaissance artists initially remained focused on religious