After the death of Pope Francis on Monday, the question looming around the world is, who will become the next leader of the Roman Catholic Church? Experts weigh in.

Celebrities are mourning the death of Pope Francis after his death on Monday.

When Pope Francis died the world lost not only the leader of the Catholic Church but also the first pontiff in history to take a stance on climate change.

The centuries-old process to pick a new pope, known as the papal conclave, typically occurs 15-20 days after a pope's death.

During Francis’ time as pope, he spoke on a wide array of controversial and political issues, including immigration, same-sex marriage, LGBTQ rights and surrogacy.

Pope Francis clashed with Donald Trump several times over the years, primarily on Trump's immigration policy and rhetoric toward migrants.

Pope Francis had been suffering from health issues in the weeks before his death, including a more than one-month stay in the hospital.

Cardinal Kevin Farrell, the senior Vatican official who announced Pope Francis's death on Monday morning.

Pope Francis’ death certificate, released by the Vatican, said he died in his apartment at 7:35 a.m. from cerebral stroke, coma and irreversible cardiocirculatory collapse.

Farrell announced Pope Francis' death to the world on Monday.

ABC News contributor Father John Wauck discusses the late pontiff's final Easter Sunday appearance in St. Peter's Square.

ABC News Medical Contributor Dr. Alok Patel discusses the health issues Pope Francis had been suffering in the weeks before his death, including a more than one-month stay in the hospital.

The Rosary prayer service is being presided by Cardinal Mauro Gambetti after Pope Francis’ death on Monday.

The archbishop of New York reflects on the late pontiff and his legacy following his death Monday morning.

ABC News medical correspondent Dr. Darien Sutton discusses the late pontiff’s health challenges over the years.

ABC News' Terry Moran met Pope Francis on a flight while on assignment as a reporter. Moran, whose wife was expecting at the time, recounted the memorable conversation he had with the pope.

The movie "Conclave" depicts the process by which a new pope is elected.

The “GMA” anchor took viewers behind the scenes of Vatican City in 2013 and recalls having a brief, yet impactful, encounter with the pope just nine months into his papacy.

The Church’s cardinals will gather in a secluded part of Vatican City to go over their options and vote for a new leader in the Sistine Chapel, sending out the iconic white smoke when one is chosen.

Throughout his 12-year pontificate, Francis was an advocate for the poor and many saw his papacy as the start of a new era for the Catholic church, marked by greater inclusion and acceptance.

Pope Francis made a short and unannounced visit Saturday to St. Peter's Basilica to pray before this evening's Easter vigil and greeted some of the faithful present.

Argentinian journalist Inés San Martín discusses the late pontiff’s 2013 visit to Rio de Janeiro for World Youth Day.

President Donald Trump made remarks about the pontiff’s death at a White House event.

ABC News’ Karen Travers reports on the late pontiff’s visits with U.S. presidents.

ABC News contributor Father James Martin discusses the late pontiff’s personality and his “pastoral outreach” on LGBTQ+ issues.

What to know about electing a new pope after the death of Pope Francis.

Often referred to as “the people’s pope,” Pope Francis embraced social media and his story was immortalized in books and on the big screen.

ABC News contributor Helen Alvare shares how the late pontiff made the church more contemporary and what the future of the Catholic Church holds.

The pontiff called for zero tolerance for clergy who sexually abused children early in his papacy and abolished pontifical secrecy for abuse cases.

Throughout his 12-year pontificate, Pope Francis was a vocal advocate for the poor and underprivileged and promoting a new era of greater inclusion and acceptance of diverse Catholics.

The leader of the Catholic Church, the first ever from Latin America, who delivered his final message to the world on Easter Sunday, died on Monday morning, the Vatican announced.

The White House posted the message “Rest in Peace, Pope Francis” on social media with Vice President JD Vance being one of the last foreign dignitaries to have an audience with the Pope.

Trump shared a message on social media Monday morning following the death of the pontiff.

ABC News’ Aaron Katersky reports on the steps the Vatican will take after the pontiff’s death.

Father James Martin discusses his moments meeting the late Pope and his legacy of marking a new era for the Catholic Church by showing more inclusion and acceptance of LGBTQ Catholics.

Even though cardinals don’t campaign for the job, there are always front-runners going into a conclave to choose the next pope

The death of a pope sets in motion a series of carefully orchestrated rites and rituals well before the conclave to elect his successor begins

Here are some things about the papacy, and popes through the ages, that you might not know.

Pope Francis died on Monday, one day after addressing the crowd from the main balcony of St. Peter's Basilica on Easter Sunday.

Pope Francis died on Monday, one day after addressing the crowd from the main balcony of St. Peter's Basilica on Easter Sunday.

ABC News' Trevor Ault reports from the Saint Patrick's Cathedral in New York City on the world's reaction to the death of Pope Francis.

ABC News contributor Helen Alvare discusses the late pontiff’s legacy and next steps in electing a new pope.

Father John Wauck describes the current mood at the Vatican following the death of Pope Francis, just a day after giving his blessing on Easter Sunday.

Vatican reporter Colleen Dulle discusses how the late pontiff spent his final days and how he’ll be remembered by Catholics around the world.

Pope Francis made a surprise appearance in St. Peter’s Square amid Easter celebrations on Sunday.  

Father John Wauck and ABC News' Marcus Moore discuss the late pontiff’s final public appearance and the timing of his death.

Francis captured the imaginations of believers and non-believers alike.

The 266th pontiff strived to make the Catholic Church more contemporary.

Father Thomas J. Reese, senior analyst for Religious News Service, and Vatican consultant Father James Martin discuss the late pontiff’s legacy.

The first pope from the Americas was born Jorge Mario Bergoglio in Buenos Aires, Argentina, on Dec. 17, 1936