Saeculum obscurum
Saeculum obscurum ( , "the dark age/century" ) , also known as the Pornocracy , was a period in the history of the Papacy during the first two-thirds of the 10th century , beginning with the installation of Pope Sergius III in 904 and lasting for sixty years until the death of Pope John XII in 964 . 
<triplet> Saeculum obscurum <subj> history of the Papacy <obj> part of