You can start here: https://en.m.wikipedia.org/wiki/Saeculum_obscurum https://en.m.wikipedia.org/wiki/Saeculum_obscurum The era is seen as one of the lowest p

You can start here: https://en.m.wikipedia.org/wiki/Saeculum_obscurum https://en.m.wikipedia.org/wiki/Saeculum_obscurum The era is seen as one of the lowest points of the history of the papal office.