The order follows a proposal by the head of the Russian Orthodox Church, Patriarch Kirill.
Pope Francis presided over the service, which was attended by some 50,000 mourners.
Benedict in 2013 became the first pope in 600 years to retire, and he chose to live out his retirement in seclusion.
Unlike many other winter holidays, Kwanzaa isn't tied to any single religion.
On the longest, darkest night of the year, Reno's witches say it's a good time to give thanks and reflect on oneself.
Hear why our Someone 2 Know donated a kidney to a man he barely knew.
Crowds massed along the streets of London on Monday to honor a monarch whose 70-year reign defined an age.
The coffin will remain at the cathedral until Tuesday so that members of the public can pay their respects.
The decision is also the latest in a line of Supreme Court rulings for religious plaintiffs.
Nineteen students and two teachers died and many others were injured in Robb Elementary School in Uvalde (Texas) by this mass-shooting.