Pope John Paul I died only 33 days after his papal election due to an apparent myocardial infarction, resulting in the first year of three popes since 1605.

Pope John Paul I was head of the Catholic Church and sovereign of Vatican City from 26 August 1978 until his death 33 days later. His reign is among the shortest in papal history, giving rise to the first year of three popes since 1605. John Paul I remains the most recent Italian-born pope, the last in a succession of such popes that started with Clement VII in 1523. He was the first pope to have been born in the 20th century, as well as the last pope to die in it.