Pope Francis in a Christmas Eve homily said that “the clash of arms even today” prevents Jesus “from finding room in the world.".
The Vatican holds that marriage is an indissoluble union between man and woman. As a result, it has long opposed same-sex marriage.
Pope Francis told a meeting of the heads of Vatican offices last week that he was moving against Burke because he was a source of “disunity” in the church.
The Vatican's new guidance comes with some caveats, however.
The 80-page book, published in 1995 but no longer in print, is being used to blast Pope Francis' appointment of Archbishop Victor Manuel Fernández.
The pope is expected to remain at Rome’s Gemelli hospital for several days and all papal audiences through June 18 have been canceled as a precaution.
In July 2021, Francis spent 10 days in hospital to remove 13 inches of his large intestine after suffering severe inflammation and narrowing of the colon.
Ukrainian President Volodymyr Zelenskyy, in a tweet, referred to the stop in Rome as "an important visit for approaching victory of Ukraine."
Pope Francis, who has repeatedly called for the fighting to end, prayed Sunday for “martyred” Ukrainians and for Russians to feel “the light of Easter."
The Vatican said the Pontiff will be hospitalized for several days for treatment of a pulmonary infection after experiencing difficulty breathing in recent days.