In the thirteenth and fourteenth century there was much confusion about the identity of the real pope, since several people claimed to be pope at the same time. It took until 1417 for all parties to recognise Martin V as the only true pope.
The popes started to accrue ever more wealth and live worldly lives. Because of these problems the Church was in dire need of renewed attention to truly following Jesus, which did happen on a small scale. During the Renaissance, however, often the human person became the centre of attention instead of God. Sadly, this was sometimes also reflected in the leadership of the Church.