St. John Paul II had the Domus Sanctae Marthae built primarily to house cardinals in simple comfort during a conclave.

The Holy See’s diplomat to the United Nations has reiterated a call to end nuclear proliferation, saying the best way to honor the late Pope Francis is to “rediscover the spirit” that created the global organization following World War II, and collaboratively strive for peace.

Cardinal Luis Antonio Tagle is a popular speaker who is comfortable in several languages, has traveled extensively and is known for his focus on evangelization and care for the poor and for immigrants.

The face of the Catholic Church’s push to reestablish its relationship with the world of culture, a 59-year-old Portuguese poet and theologian, is among the youngest of the cardinals mentioned as a contender to become the successor of St. Peter.

As successors to the apostles, members of the College of Cardinals are called to follow the example of Christ who came to serve and not be served, the subdean of the college said.

The conclave to elect a new pope, scheduled to begin May 7, is governed by two texts: a rule book and a prayer book.

The College of Cardinals confirmed that 135 members are eligible to participate in the conclave, the Vatican announced, and they asked the faithful to accompany them in prayer as they prepare to elect the next pope.

The following is a snapshot of the papacies of the 11 popes that preceded Pope Francis, from Pope Benedict XVI to Blessed Pope Pius IX.

Cardinal Matteo Zuppi of Bologna, the Rome-born president of the Italian bishops’ conference, is frequently mentioned as a probable candidate for pope.

Nearing 80 years old, Italian Cardinal Mario Zenari has spent the past 16 years in the wartorn nation of Syria as papal nuncio.