10th-century Christianity

Bogomilism (; ; ) was a Christian neo-Gnostic, dualist sect founded in the First Bulgarian Empire by the priest Bogomil during the reign of Tsar Peter I in the 10th century. It most likely arose in the region of Kutmichevitsa, today part of the region of Macedonia.

10th-century Christianity

period of corrupt papal appointments in the 10th century

changes within medieval monasticism

history of the spread of Christianity in Poland

The Crescentii (in modern Italian Crescenzi) were a baronial family, attested in Rome from the beginning of the 10th century and which in fact ruled the city and the election of the popes until the beginning of the 11th century.

Catholic Gregorian chant

Re-emphasis of monastic rule at the expense of secular clergy in English religious communities in the late 10th century