Saturn and Mitra hats are seen in a religious shop in Rome, Italy, September 18, 2018. REUTERS/Alessandro Bianchi 

Pope's hat, named Saturn, and a Cardinal's hat are seen in a religious shop in Rome, Italy, September 18, 2018. REUTERS/Alessandro Bianchi 

Pope's hat, named Saturn, is seen in a religious shop in Rome, Italy, September 18, 2018. REUTERS/Alessandro Bianchi 

Pope Benedict XVI wears a red cap as he arrives to lead his weekly general audience in Saint Peter's Square at the Vatican September 6, 2006. Pope Benedict has a thing for old hats, this time donning a wide-brimmed 'saturno' for his weekly general audience in St Peter's Square on Wednesday. It was the first time the 79-year-old German pontiff has worn the red hat, known in Italian as a saturno because it is vaguely reminiscent of the ringed planet Saturn. REUTERS/Max Rossi (VATICAN) 

Pope Benedict XVI is silhouetted as he arrives to lead his weekly general audience in Saint Peter's Square at the Vatican September 6, 2006. Pope Benedict has a thing for old hats, this time donning a wide-brimmed "saturno" for his weekly general audience in St Peter's Square on Wednesday. It was the first time the 79-year-old German pontiff has worn the red hat, known in Italian as a saturno because it is vaguely reminiscent of the ringed planet Saturn. REUTERS/Max Rossi (VATICAN) 

Pope Benedict XVI wears a red hat as he arrives to lead his weekly general audience in Saint Peter's Square at the Vatican September 6, 2006. Pope Benedict has a thing for old hats, this time donning a wide-brimmed "saturno" for his weekly general audience in St Peter's Square on Wednesday. It was the first time the 79-year-old German pontiff has worn the red hat, known in Italian as a saturno because it is vaguely reminiscent of the ringed planet Saturn. REUTERS/Max Rossi (VATICAN)