There were many causes of Reformation, some go as far back as the fourteenth century. One of the main ones was that the papal authority and credibility were damaged. This was done through, Avignon papacy, - a time where the headquarters of the Holy See had to be moved from Rome to Avignon, it brought uncertainty to the people, as they did not trust the Pope, and believed the Pope favoured the French. Following this, the Great Western Schism also contributed to the loss of papal authority as it split Christian Europe into hostile camps, because three different men were claiming to be the true Pope, each having some support from different kings and princes of Europe. Finally, the corruption of the Renaissance papacy, such as that of Alexander VI (who did not keep the celibacy vow) resulted in loss of papal credibility.
As the Holy See was not as powerful anymore, it was suffering from attacks on the papacy. Many felt that the Pope and his Bishops had developed into an abusive feudal monarchy. They were not happy that the Church was concentrating on making profits and not on the spiritual well being of people. Early reformation movements such as the Lollards and the Hussites that were founded by John Wycliffe and John Huss respectively were suppressed for their attacks on the papacy.
People also resented the Church, because of practices such the indulgences – when individuals paid to church for forgiveness of their sins. The society was aware that the higher clergy was interested in political power, material possessions, and privileged position in public