Bible Encyclopedias
John XVIII
1911 Encyclopedia Britannica
Pope from 1003 to 1009, was, during his whole pontificate, the mere creature of the patrician John Crescentius, and ultimately he abdicated and retired to a monastery, where he died shortly afterwards. His successor was Sergius IV.
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Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'John XVIII'. 1911 Encyclopedia Britanica. https://www.studylight.org/​encyclopedias/​eng/​bri/​j/john-xviii.html. 1910.