A pigeon walks near a puddle with the Duomo cathedral reflected in it, during the coronavirus disease (COVID-19) outbreak in central Milan, Italy March 31, 2020. REUTERS/Flavio Lo Scalzo 

A woman walks past Duomo cathedral, during the coronavirus disease (COVID-19) outbreak in central Milan, Italy March 31, 2020. REUTERS/Flavio Lo Scalzo 

A person rides a bicycle past Milan Cathedral on the second day of an unprecedented lockdown across all of the country, imposed to slow the outbreak of coronavirus, in Milan, Italy March 11, 2020. REUTERS/Flavio Lo Scalzo 

A man wearing a protective face mask to prevent contracting the coronavirus walks past the Duomo Cathedral in Milan, Italy, March 4, 2020. REUTERS/Guglielmo Mangiapane 

A tourist visits Milan's Duomo cathedral, as it reopened to the public for the first time since the coronavirus outbreak in northern Italy, in Milan, Italy, March 2, 2020. REUTERS/Yara Nardi 

Tourists visit Milan's Duomo cathedral, as it reopened to the public for the first time since the coronavirus outbreak in northern Italy, in Milan, Italy, March 2, 2020. REUTERS/Yara Nardi 

View inside Milan's Duomo cathedral, as it reopened to the public for the first time since the coronavirus outbreak in northern Italy, in Milan, Italy, March 2, 2020. REUTERS/Yara Nardi 

Tourists visit Milan's Duomo cathedral, as it reopens to the public for the first time since the coronavirus outbreak in northern Italy, in Milan, Italy, March 2, 2020. REUTERS/Yara Nardi 

A security officer checks the belongings of a tourist entering Milan's Duomo cathedral, as it reopens to the public for the first time since the coronavirus outbreak in northern Italy, in Milan, Italy, March 2, 2020. REUTERS/Yara Nardi 

Checks are made on people entering Milan's Duomo cathedral as it reopens to the public for the first time since the coronavirus outbreak in northern Italy, in Milan, Italy, March 2, 2020. REUTERS/Yara Nardi 

General view of Milan's Duomo cathedral, as it reopened to faithfuls for the first time since the coronavirus outbreak in northern Italy, in Milan, Italy, March 2, 2020. REUTERS/Yara Nardi 

A security officer wearing a face mask stands at the entrance of Milan's Duomo cathedral, as it reopened to faithfuls for the first time since the coronavirus outbreak in northern Italy, in Milan, Italy, March 2, 2020. REUTERS/Yara Nardi 

People wearing face masks walk past security officers at the entrance of Milan's Duomo cathedral, as it reopened to faithfuls for the first time since the coronavirus outbreak in northern Italy, in Milan, Italy, March 2, 2020. REUTERS/Yara Nardi 

People walk past Duomo cathedral, as a coronavirus outbreak continues to grow in northern Italy, in Milan, Italy, February 27, 2020. REUTERS/Yara Nardi 

Military officers wearing face masks stand outside Duomo cathedral, closed by authorities due to a coronavirus outbreak, in Milan, Italy February 24, 2020. REUTERS/Flavio Lo Scalzo TPX IMAGES OF THE DAY 

Military officers wearing face masks stand outside Duomo cathedral, closed by authorities due to a coronavirus outbreak, in Milan, Italy February 24, 2020. REUTERS/Flavio Lo Scalzo 

A woman reads a newspaper outside Duomo cathedral, closed by authorities due to a coronavirus outbreak, in Milan, Italy February 24, 2020. REUTERS/Flavio Lo Scalzo 

The Duomo cathedral is pictured amidst dense fog and smog in Milan, Italy, January 8, 2020. REUTERS/Flavio Lo Scalzo 

A Christmas tree is seen near the Madonnina, a statue of the Virgin Mary atop Duomo cathedral, in Duomo Square in downtown Milan, Italy, December 6, 2019. REUTERS/Flavio Lo Scalzo 

The Madonnina, a statue of the Virgin Mary atop Duomo cathedral, is seen through Christmas lights near Duomo Square in downtown Milan, Italy, December 6, 2019. REUTERS/Flavio Lo Scalzo 

Versace's advertising banner is seen on Duomo cathedral in Milan, Italy, September 25, 2018. REUTERS/Stefano Rellandini 

Duomo's cathedral and Porta Nuova's financial district are seen in Milan, Italy, May 16, 2018. REUTERS/Stefano Rellandini 

A man looks at columns at the rooftop of the Cathedral of Milan, Italy January 20, 2018. REUTERS/Jorge Silva 

People watch the sunset at the rooftop of the Cathedral of Milan, Italy January 20, 2018. REUTERS/Jorge Silva 

Italian Army officers patrol in front of the Milan Cathedral on the eve of Pope Francis' visit in Milan, Italy March 24, 2017. REUTERS/Alessandro Garofalo 

An Italian Army officer patrols in front of the Milan Cathedral on the eve of Pope Francis' visit in Milan, Italy, on March 24, 2017. REUTERS/Alessandro Garofalo 

Workers place barriers in front of the Milan Cathedral on the eve of Pope Francis' visit in Milan, Italy March 24, 2017. REUTERS/Alessandro Garofalo 

An Italian Army officer patrols in front of the Milan Cathedral on the eve of Pope Francis' visit in Milan, Italy March 24, 2017. REUTERS/Alessandro Garofalo 

Workers are seen in front of the Milan Cathedral on the eve of Pope Francis' visit in Milan, Italy March 24, 2017. REUTERS/Alessandro Garofalo 

Pope Francis walks out of the Duomo, the cathedral of Milan, to recite the Angelus with the faithful in Duomo Square in Milan, Italy, March 25, 2017. REUTERS/Stefano Rellandini

Pope Francis addresses priests and consecrated persons as Cardinal Angelo Scola, the Archbishop of Milan, looks on at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

The faithful watch on an outdoor big screen as Pope Francis meets with priests and consecrated persons inside the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Stefano Rellandini

Cardinal Angelo Scola, the Archbishop of Milan, presents a chalice to Pope Francis during a meeting with priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Cardinal Angelo Scola, the Archbishop of Milan, presents a chalice to Pope Francis during a meeting with priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Priests help Pope Francis with his stole after his address to priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis kisses his stole after his address to priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

A priest helps Pope Francis with his stole after his address to priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis addresses priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis addresses priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis addresses priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis addresses priests and consecrated persons as Cardinal Angelo Scola, the Archbishop of Milan, looks on at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis addresses priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis addresses priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis addresses priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis addresses priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis addresses priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis addresses priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis addresses priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis addresses priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis and Cardinal Angelo Scola, the Archbishop of Milan, embrace during a meeting with priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis arrives for a meeting with priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis takes notes during a speech by Cardinal Angelo Scola, the Archbishop of Milan, during a meeting with priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis and Cardinal Angelo Scola, the Archbishop of Milan, embrace during a meeting with priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis and Cardinal Angelo Scola, the Archbishop of Milan, arrive for a meeting with priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis listens to a speech by Cardinal Angelo Scola, the Archbishop of Milan, during a meeting with priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis listens to a speech by Cardinal Angelo Scola, the Archbishop of Milan, during a meeting with priests and consecrated persons at the Duomo, the cathedral of Milan, in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

A nun takes a photo as Pope Francis arrives at the Duomo, the cathedral of Milan, for a meeting with priests and consecrated persons in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis arrives at the Duomo, the cathedral of Milan, for a meeting with priests and consecrated persons in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis arrives at the Duomo, the cathedral of Milan, for a meeting with priests and consecrated persons in Milan, Italy, March 25, 2017. REUTERS/Max Rossi

Pope Francis arrives at the Duomo, the cathedral of Milan, for a meeting with priests and consecrated persons in Milan, Italy, March 25, 2017. REUTERS/Max Rossi