VATICAN CITY – Pope Benedict ended his difficult reign on Thursday pledging unconditional obedience to whoever succeeds him to guide the Roman Catholic Church at one of the most crisis-ridden periods in its 2,000-year history.

The papacy became vacant at 8 p.m., marking the first time in six centuries a pope has resigned instead of ruling for life.

In a symbolic gesture, the Swiss Guards who stood sentry at the papal summer residence south of Rome, where the pope flew by helicopter less than three hours earlier, quit their posts and the massive wooden doors of the hilltop residence were closed.

At the same time, the papal apartments in the Vatican were locked and will not be opened until a new pope is elected.

As he left the Vatican several hours earlier by helicopter, he sent his last Twitter message: “Thank you for your love and support. May you always experience the joy that comes from putting Christ at the center of your lives.”

Bells rang out from St Peter’s Basilica and churches all over Rome as the helicopter circled Vatican City and flew over the Colosseum and other landmarks to give the pontiff one last view of the city where he is also bishop.

He told the crowd, many of whom were crying, that he would soon become “simply be a pilgrim who is starting the last phase of his pilgrimage on this earth.”

In an emotional farewell to cardinals on Thursday morning in the Vatican’s frescoed Sala Clementina, Benedict appeared to send a strong message to the top echelons of the Church as well as the faithful to unite behind his successor, whoever he is.

“I will continue to be close to you in prayer, especially in the next few days, so that you are fully accepting of the action of the Holy Spirit in the election of the new pope,” he said. “May the Lord show you what he wants. Among you there is the future pope, to whom I today declare my unconditional reverence and obedience.”

The pledge, made ahead of the closed-doors conclave where cardinals will elect his successor, was significant because for the first time in history, there will be a reigning pope and a former pope living side by side in the Vatican.

Benedict will spend the first few months of his retirement in the papal summer residence, a complex of villas boasting lush gardens, a farm and stunning views over Lake Albano in the volcanic crater below the town.

Benedict will stay until April when renovations are completed on a convent in the Vatican that will be his new home. g

-Reuters, TAAN