Today is the anniversary of the election to the papacy of John Paul I in 1978; he would be Pope for a total of 33 days, the twelfth shortest papal reign in history. Here is the report from NBC Nightly News.
As a matter of historical interest, here is a copy of a letter which he issued earlier that same year, by which he reiterated his prohibition on the celebration of the traditional Mass at the church of St Simon Piccolo in Venice, of which he was Patriarch until his papal election. The traditional Mass is still celebrated there to this day.