Pope Agapetus II was the bishop of Rome and ruler of the Papal States from 10 May 946 to his death. A nominee of the princeps of Rome, Alberic II of Spoleto, his pontificate occurred during the period known as the Saeculum obscurum.

Saeculum obscurum, also known as the Pornocracy or the Rule of the Harlots, was a period in the history of the papacy during the first two thirds of the 10th century, following the chaos after the death of Pope Formosus in 896 which saw seven or eight papal elections in as many years. It began with the installation of Pope Sergius III in 904 and lasted for 60 years until the death of Pope John XII in 964. During this period, the popes were influenced strongly by a powerful and allegedly corrupt aristocratic family, the Theophylacti, and their relatives and allies. The era is seen as one of the lowest points of the history of the papal office.