Today on "Pure Opelka," Emily Zanotti of Heat Street and previous Vatican "temp" joined Mike Opelka to discuss the Internet's panic over mantillas.

During President Donald Trump's visit with Pope Francis, both Melania and Ivanka Trump wore black outfits with black lace headscarves, or mantillas, and people of all faiths went into an online tizzy. Some felt the look was funereal, others hypocrtitical because they wouldn't cover their heads in Saudi Arabia.

Zanotti, who has done work on canon law and in the Vatican's music archives, explained that it's a requirement to "don a black mantilla and a black dress if you're having an official audience with the Pope."

It is an ancient Vatican protocol; if a woman fails to dress this way for the Pope, she won't be denied an audience. A woman who observes this custom is showing respect to the most holy site in Catholicism.

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