Thousands witness beatification of "Smiling Pope" by Vatican

Thousands of people gathered in St Peter's Square on September 4 as Pope Francis presided over the beatification of John Paul I, the so-called "Smiling Pope" who led the Catholic Church for just 33 days before dying in contested circumstances.

John Paul I, the son of a bricklayer from the Dolomite mountains and a particularly warm and pastoral figure was elected pope on August 26, 1978, at the age of 65, according to France 24.

He died just 33 days later, on September 28, 1978, of a heart attack, making him the shortest serving pontiff in modern church history.

A crowd of several thousand including Italian President Sergio Mattarella gathered under umbrellas through a thunderstorm to listen to the beatification mass - a step before canonization and becoming a "saint".

"With a smile, Pope John Paul managed to communicate the goodness of the Lord," said Pope Francis during the mass on September 4.

"How beautiful is a Church with a happy, serene and smiling face, that never closes doors, never hardens hearts, never complains or harbours resentment, does not grow angry or impatient, does not look dour or suffer nostalgia for the past."

A wall hanging representing the late pope was hung on the front of St Peter's Basilica.

The death of John Paul I death sparked intense speculation as to the cause, from suicide -- he seemed reluctant to take on the position of the pope - to murder, allegedly by those who opposed his plans to reform the church, particularly the powerful Vatican bank.

Many have since discounted this and biographer Christophe Henning said the swirling rumours can be explained by the sudden nature of his death and the "calamitous communication" by the Vatican at the time.

No autopsy was conducted to determine the cause of death, and the Vatican issued inconsistent and false information about what happened.

For example, his lifeless body - sitting in bed, his reading glasses on his nose and typewritten documents in his hand - was found by a nun.

However, the Vatican did not want to acknowledge the presence of a woman in his bedroom, so said his secretary found him.

"For me, it does not seem that there is really a doubt" about his death by natural causes, particularly given "we know that he was in fragile health", Henning told AFP.