Is 157 sidereal days as long as Boniface VI's reign?
It's about ten times as long as Boniface VI's reign
The length of Boniface VI's reign is about 15 sidereal days.
(AD 896)
The Church's enigmatic, shortest-reigning Pope, Boniface VI was pontiff for a period of 15 sidereal days in AD 896 before dying under somewhat mysterious circumstances. His election was subsequently pronounced null by Pope John IX because Boniface had been previously defrocked while serving as a Roman priest.
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