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Date of birth unknown; d. 6 Nov., 1003. When Sylvester II died on 12 May, 1003, there was no actual authority in Rome which could curb the nobles. Thus the faction of Crescentius again won the upper hand, and John Crescentius, son of the patricius whom Otto III had defeated and put to death, seized the authority for himself. The three following popes were indebted to him for their elevation, and were made to feel his supremacy. A Roman, Sicco, was first elected, and consecrated on 13 June as John XVII, but died on 6 November. Before taking orders he had been married, and had three sons who also became ecclesiastics. Concerning his activities during the few months of his pontificate nothing has come down to us.

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The Catholic Encyclopedia is the most comprehensive resource on Catholic teaching, history, and information ever gathered in all of human history. This easy-to-search online version was originally printed between 1907 and 1912 in fifteen hard copy volumes.

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Designed to present its readers with the full body of Catholic teaching, the Encyclopedia contains not only precise statements of what the Church has defined, but also an impartial record of different views of acknowledged authority on all disputed questions, national, political or factional. In the determination of the truth the most recent and acknowledged scientific methods are employed, and the results of the latest research in theology, philosophy, history, apologetics, archaeology, and other sciences are given careful consideration.

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Copyright © Catholic Encyclopedia. Robert Appleton Company New York, NY. Volume 1: 1907; Volume 2: 1907; Volume 3: 1908; Volume 4: 1908; Volume 5: 1909; Volume 6: 1909; Volume 7: 1910; Volume 8: 1910; Volume 9: 1910; Volume 10: 1911; Volume 11: - 1911; Volume 12: - 1911; Volume 13: - 1912; Volume 14: 1912; Volume 15: 1912

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