Dubbed "the smiling pope", John Paul I served as pontiff from 26 August 1978 to his sudden death 33 days later, which quickly became fertile ground for conspiracy theorists.
Acknowledging his official virtues is a step before beatification, which is reserved for three categories of people: martyrs, those who have lived a life of heroic values, and others with a clear saintly reputation.
Candidates must also be credited with a miracle after their death. Those beatified can then move towards sainthood.
Born Albino Luciani, the son of a bricklayer, he was the last Italian pope and a particularly warm and pastoral figure.
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He is perhaps best known, however, for his death, which quickly attracted a series of rumours ranging from his murder by dark forces linked to a corrupt Vatican bank, to suicide by a man who did not want to be pope.
Stefania Falasca, a journalist for Avvenire, the Italian Catholic daily newspaper, said yesterday that the conspiracy was fuelled by a lack of transparency on the Vatican's part in the hours immediately following the pope's death.
The inconsistencies that later emerged in the time-line drove some to believe the Church was hiding a dark secret.
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