The pontiff left the hospital on Sunday following treatment for a severe respiratory infection that led to bilateral pneumonia.

Pope Francis experienced more respiratory problems and went on noninvasive ventilation on Monday, the Vatican said, as the head of the Roman Catholic Church battles double pneumonia in the hospital.

Pope Francis' condition remains critical but stable and he was able to do some work while still in the hospital with double pneumonia, the Vatican said in a Tuesday evening update.

Pope Francis has pneumonia in both lungs, according to the Vatican. There's concern about the ability of the 88-year-old pontiff to fight off the infection.

Doctors prescribed "absolute rest" for Pope Francis, the Vatican said Saturday, a day after the 88-year-old pope was admitted to a hospital following a weeklong bout of bronchitis.

The pope’s meeting with the Muslim leader in Jakarta comes during the first leg of an intense 11-day, four-nation tour in Asia and Oceania.

A document called "Infinite Dignity" details what the Vatican sees as grave violations of dignity. Poverty, war and the abuse of migrants lead the list.

Bishop Rolando Álvarez and the other clergy were jailed more than a year ago, in most cases, as part of a crackdown on the opposition and Catholic Church by President Daniel Ortega.

Cardinal Angelo Becciu, the first cardinal ever prosecuted by the Vatican criminal court, was convicted in a complicated financial trial that aired the Vatican's dirty laundry.

In the past, tours of the ancient burial site were generally only granted to approved academics, students and other specialists.

Roman Catholic leaders from around the world are gathering at the Vatican for a synod, or meeting, to address issues facing the church, including whether to allow women to become deacons.

In a letter to conservative cardinals, the pope suggested that such blessings for same-sex unions could be studied if they didn't confuse the blessing with sacramental marriage.

Catholic women's groups that have long criticized the Vatican for treating women as second-class citizens immediately praised the move as historic in the 2,000-year life of the church.

The doctrine, with origins in the 15th century, was invoked as a legal and religious standing by Europeans who "discovered" new lands and violently seized it from people who had been living there.

The leader of the world's 1.3 billion Catholics has steered his church leftward after more than two decades of conservative leadership. Opposition within the Vatican is fierce.