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Cogimur jubente altissimo
1481 papal bull / From Wikipedia, the free encyclopedia
Cogimur jubente altissimo is a papal bull issued by Pope Sixtus IV on 8 April 1481 calling for a crusade against the Ottoman Empire.[1]
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Sixtus granted indulgences to those who took part in the crusade and instituted a tithe to pay for it.[1] He also surrendered his own silver plate to fund the crusade.[1]