Pope Benedict slips quietly from the world stage on Thursday after a private last goodbye to his cardinals and a short flight to a country palace to enter the final phase of his life "hidden from the world".
In keeping with his shy and modest ways, there will be no public ceremony to mark the first papal resignation in six centuries and no solemn declaration ending his nearly eight-year reign at the head of the world's largest church.
His last public appearance will be a short greeting to residents and well-wishers at Castel Gandolfo, the papal summer residence south of Rome, in the late afternoon after his 15-minute helicopter hop from the Vatican.
When the resignation becomes official at 8 p.m. Rome time (1900 GMT), Benedict will be relaxing inside the 17th century palace. Swiss Guards on duty at the main gate to indicate the pope's presence within will simply quit their posts and return to Rome to await their next pontiff.
Avoiding any special ceremony, Benedict used his weekly general audience on Wednesday to bid an emotional farewell to more than 150,000 people who packed St Peter's Square to cheer for him and wave signs of support.
With a slight smile, his often stern-looking face seemed content and relaxed as he acknowledged the loud applause from the crowd.
"Thank you, I am very moved," he said in Italian. His unusually personal remarks included an admission that "there were moments ... when the seas were rough and the wind blew against us and it seemed that the Lord was sleeping".
CARDINALS PREPARE THE FUTURE
Once the chair of St Peter is vacant, cardinals who have assembled from around the world for Benedict's farewell will begin planning the closed-door conclave that will elect his successor.
One of the first questions facing these "princes of the Church" is when the 115 cardinal electors should enter the Sistine Chapel for the voting. They will hold a first meeting on Friday but a decision may not come until next week.
The Vatican seems to be aiming for an election by mid-March so the new pope can be installed in office before Palm Sunday