Christian-Muslim Relations 600 - 1500

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 Opus maius
(3,341 words)


Roger Bacon

Date: Put together between 1266 and 1268, almost certainly in part from existing treatises

Original Language: Latin


The Opus maius was written at the request of Pope Clement IV, who had asked to be told about Bacon’s remedies for an unspecified ‘great danger’. Its text, which was put together between 1266 and 1268, has yet to be fully established. The manuscript tradition is particularly complex becaus…

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Power, Amanda, “ Opus maius”, in: Christian-Muslim Relations 600 - 1500, General Editor David Thomas. Consulted online on 18 October 2019 <>
First published online: 2010

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