section_path: Controversy
section_name: Controversy
paragraph_text: Controversy
  
  The immediate result of the 1543 publication of Copernicus's book was only mild controversy. At the Council of Trent (1545–1563) neither Copernicus's theory nor calendar reform (which would later use tables deduced from Copernicus's calculations) were discussed. It has been much debated why it was not until six decades after the publication of De revolutionibus that the Catholic Church took any official action against it, even the efforts of Tolosani going unheeded. Catholic side opposition only commenced seventy-three years later, when it was occasioned by Galileo.