When it was published in 1543, Copernicus's new astronomy had an enormous impact on intellectual life in early modern Europe, but the reception of his new ideas differed fundamentally from one country to another. Rienk Vermij discusses howunlike in Roman Catholic landsdiscussion in the heavily Calvinist Dutch Republic was initially dominated by humanist scholars who judged Copernicus's work on its mathematical merits. Yet even in this environment, it could not escape eventual philosophical, religious, and political controversies. This book shows how Copernicus's astronomy changed from an alternative cosmology into an established worldview in the Dutch Republic.