One hundred and twelve cardinal electors participated in the papal conclaves of August and October 1978, which were respectively convened to elect a pope, the leader of the Catholic Church, to succeed Pope Paul VI and Pope John Paul I following their respective deaths on 6 August and 28 September 1978. According to the apostolic constitution Romano Pontifici eligendo, which governed the vacancy of the Holy See, only cardinals who had not passed their 80th birthday on the day on which the conclave began were eligible to participate. The cardinal electors entered the Sistine Chapel to begin the first conclave on 25 August. On 26 August, after four ballots over two days, they elected Cardinal Albino Luciani, Patriarch of Venice, who took the papal name John Paul I (pictured, left). After his death 33 days into his papacy, the cardinal electors again entered the Sistine Chapel to begin the second conclave on 14 October. On 16 October, after eight ballots over three days, they elected Cardinal Karol Wojtyła, Archbishop of Kraków, who took the papal name John Paul II (pictured, right). (Full list...)