In Western Europe, a century after the invention of the printing press, a widespread underground press emerged in the mid-16th century with the clandestine circulation of Calvinist books and broadsides, many of them printed in Geneva, which were secretly smuggled into other nations where the carriers who distributed such literature might face imprisonment, torture or death. Both Protestant and Catholic nations fought the introduction of Calvinism, which with its emphasis on intractable evil made its appeal to alienated, outsider subcultures willing to violently rebel against both church and state. In 18th century France, a large illegal underground press of the Enlightenment emerged, circulating anti-Royalist, anti-clerical and pornographic works in a context where all published works were officially required to be licensed. Starting in the mid-19th century an underground press sprang up in many countries around the world for the purpose of circulating the publications of banned Marxist political parties; during the German Nazi occupation of Europe, clandestine presses sponsored and subsidized by the Allies were set up in many of the occupied nations, although it proved nearly impossible to build any sort of effective underground press movement within Germany itself.