Pope Nicholas IV, the first Franciscan to ever be pope, dies in Rome. Pope Nicholas IV had at first refused the office but was later convinced to reconsider and eventually accept the papacy. His political policies were not always popular, especially his focus on both crusading and hunting heretics.
To ensure the security of the papacy, he forged political alliances which created new enemies. For example, he provided a lo of support to the Colonnas family in Rome and this created dissent among much of the Roman populace.
The one action of Pope Nicholas IV which did not create widespread dissatisfaction seems to have been establishing the Catholic Church in China.