The 85-year-old announced the decision in Latin during a meeting of Vatican cardinals this morning.
He said that because of his age and diminishing strength, he didn't feel he could carry on.
On the Island, Lord Bishop Robert Paterson has described the Pope as having a formidable intellect but also formidably conservative.
He admits the resignation has come as a surprise:
No increase in domestic gas prices for rest of 2026
CURA carries out interim review into tariffs
Law targeting sale of nicotine pouches takes step further
Nicotine Products Bill 2026 passes through Keys while LegCo asks for more time
Procurement process for Kirk Onchan Post Office continuing
And question mark over future of services in PSM
Bus station will not be moved to the Sea Terminal
DoI favours a £735,000 'combined package' of facilities elsewhere instead