An artisan roofer repairs city rooftops and chimney stacks on residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

An artisan roofer repairs city rooftops and chimney stacks on residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

An artisan roofer repairs city rooftops and chimney stacks on residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

An artisan roofer repairs city rooftops and chimney stacks on residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

An artisan roofer repairs city rooftops and chimney stacks on residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A view shows city rooftops and chimney stacks of residential apartment buildings near the Eiffel Tower in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

Women have a picnic on the rooftop of a residential apartment building in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes TPX IMAGES OF THE DAY

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

An artisan roofer repairs city rooftops and chimney stacks on residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

Olivier Boileau Descamps General secretary at support committee of the UNESCO Commission on intangible cultural heritage walks at city rooftop of a residential apartment building in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

A view shows city rooftops and chimney stacks of residential apartment buildings in Paris, France, February 19, 2021. REUTERS/Gonzalo Fuentes

French baguettes dough is kneaded in a machine at "La Parisienne" bakery in Paris, France, February 17, 2021. Picture taken on February 17, 2021. REUTERS/Sarah Meyssonnier

French freshly-baked baguettes are seen in a wicker basket at "La Parisienne" bakery in Paris, France, February 17, 2021. Picture taken on February 17, 2021. REUTERS/Sarah Meyssonnier

French baker Mickael Reydellet, wearing a protective face mask, poses with freshly-baked baguettes at "La Parisienne" bakery in Paris, France, February 17, 2021. Picture taken on February 17, 2021. REUTERS/Sarah Meyssonnier

A baker looks at the inside of a freshly-baked baguette near the oven at "La Parisienne" bakery in Paris, France, February 17, 2021. Picture taken on February 17, 2021. REUTERS/Sarah Meyssonnier

French baker Mickael Reydellet, wearing a protective face mask, installs freshly-baked baguettes in a wicker basket at "La Parisienne" bakery in Paris, France, February 17, 2021. Picture taken on February 17, 2021. REUTERS/Sarah Meyssonnier

The inside of a freshly-baked baguette is seen at "La Parisienne" bakery in Paris, France, February 17, 2021. Picture taken on February 17, 2021. REUTERS/Sarah Meyssonnier

An employee, wearing a protective face mask, throws flour on dough for French baguettes near the oven at "La Parisienne" bakery in Paris, France, February 17, 2021. Picture taken on February 17, 2021. REUTERS/Sarah Meyssonnier

French baker Mickael Reydellet checks French baguettes dough at "La Parisienne" bakery in Paris, France, February 17, 2021. Picture taken on February 17, 2021. REUTERS/Sarah Meyssonnier

French baker Mickael Reydellet, wearing a protective face mask, looks a tray of freshly-baked baguettes near the oven at "La Parisienne" bakery in Paris, France, February 17, 2021. Picture taken on February 17, 2021. REUTERS/Sarah Meyssonnier

An employee scores French baguettes dough at "La Parisienne" bakery in Paris, France, February 17, 2021. Picture taken on February 17, 2021. REUTERS/Sarah Meyssonnier

A baker shows the inside of a freshly-baked baguette near the oven at La Parisienne bakery in Paris, France, February 17, 2021. Picture taken on February 17, 2021. REUTERS/Sarah Meyssonnier

French baker Mickael Reydellet, wearing a protective face mask, takes out of the oven a tray of baguettes at "La Parisienne" bakery in Paris, France, February 17, 2021. Picture taken on February 17, 2021. REUTERS/Sarah Meyssonnier

French freshly-baked baguettes cool after their removal from an oven at "La Parisienne" bakery in Paris, France, February 17, 2021. Picture taken on February 17, 2021. REUTERS/Sarah Meyssonnier

French baker Mickael Reydellet displays a freshly-baked baguette at "La Parisienne" bakery in Paris, France, February 17, 2021. Picture taken on February 17, 2021. REUTERS/Sarah Meyssonnier

Directors and employees control performances of Arab Music Heritage Troupe during a tour around the country, inside the Tahya Misr housing project, amid the coronavirus disease (COVID-19) pandemic, in Al Mokattam district of Cairo, Egypt January 30, 2021. Picture taken January 30, 2021. REUTERS/Amr Abdallah Dalsh

A flock of pigeons rests at the premises of Boudhanath Stupa, a UNESCO's world heritage site in Kathmandu, Nepal January 17, 2021. REUTERS/Navesh Chitrakar TPX IMAGES OF THE DAY

A view of Boudhanath Stupa, a UNESCO's world heritage site famous among Buddhist devotees and tourists, is pictured through the window of a restaurant, as tourism and businesses are affected amidst the spread of coronavirus disease (COVID-19), in Kathmandu, Nepal January 15, 2021. REUTERS/Navesh Chitrakar

A view of Boudhanath Stupa, a UNESCO's world heritage site famous among Buddhist devotees and tourists, is pictured through the window of a restaurant, as tourism and businesses are affected amidst the spread of coronavirus disease (COVID-19), in Kathmandu, Nepal January 15, 2021. REUTERS/Navesh Chitrakar

Dog handler Kim Edwards (L) and Science for Wildlife research scientist Victoria Inman conduct a population density survey with koala scat-sniffing dog Smudge in habitat burned during the previous bushfire season in the Greater Blue Mountains World Heritage Area, Australia, September 14, 2020. REUTERS/Loren Elliott

A woman takes a picture of trulli, limestone buildings of Alberobello, a World Heritage Site, lit up with Christmas animations, as Italy goes back to a complete lockdown during Christmas season as part of efforts to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 23, 2020. Picture taken December 23, 2020. REUTERS/Alessandro Garofalo

A man walks his dog in front of the Trullo Sovrano, a limestone building of Alberobello, a World Heritage Site, lit up with Christmas animations, as Italy goes back to a complete lockdown during Christmas season as part of efforts put in place to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 24, 2020. REUTERS/Alessandro Garofalo

General view of trulli, limestone buildings of Alberobello, a World Heritage Site, lit up with Christmas animations, as Italy goes back to a complete lockdown during Christmas season as part of efforts put in place to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 24, 2020. REUTERS/Alessandro Garofalo

A man wearing a face mask, walks in front of the Trullo Sovrano, a limestone building of Alberobello, a World Heritage Site, lit up with Christmas animations, as Italy goes back to a complete lockdown during Christmas season as part of efforts put in place to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 24, 2020. REUTERS/Alessandro Garofalo

A man wearing a face mask, walks in Alberobello, a World Heritage Site, as Italy goes back to a complete lockdown during Christmas season as part of efforts put in place to curb the spread of the coronavirus disease (COVID-19), Italy, December 24, 2020. REUTERS/Alessandro Garofalo

A woman walks in front of trulli, limestone buildings of Alberobello, a World Heritage Site, lit up with Christmas animations, as Italy goes back to a complete lockdown during Christmas season as part of efforts to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 23, 2020. Picture taken December 23, 2020. REUTERS/Alessandro Garofalo

People walk between trulli, limestone buildings of Alberobello, a World Heritage Site, lit up with Christmas animations, as Italy goes back to a complete lockdown during Christmas season as part of efforts to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 24, 2020. REUTERS/Alessandro Garofalo

General view of trulli, limestone buildings of Alberobello, a World Heritage Site, lit up with Christmas animations, as Italy goes back to a complete lockdown during Christmas season as part of efforts put in place to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 24, 2020. REUTERS/Alessandro Garofalo

A man walks between trulli, limestone buildings of Alberobello, a World Heritage Site, lit up with Christmas animations, as Italy goes back to a complete lockdown during Christmas season as part of efforts put in place to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 24, 2020. REUTERS/Alessandro Garofalo TPX IMAGES OF THE DAY

People wearing face masks, walk in front of trulli, limestone buildings of Alberobello, a World Heritage Site, lit up with Christmas animations, as Italy goes back to a complete lockdown during Christmas season as part of efforts to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 23, 2020. Picture taken December 23, 2020. REUTERS/Alessandro Garofalo

People walk between trulli, limestone buildings of Alberobello, a World Heritage Site, lit up with Christmas animations, as Italy goes back to a complete lockdown during Christmas season as part of efforts put in place to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 24, 2020. REUTERS/Alessandro Garofalo

A man walks between trulli, limestone buildings of Alberobello, a World Heritage Site, lit up with Christmas animations, as Italy goes back to a complete lockdown during Christmas season as part of efforts put in place to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 24, 2020. REUTERS/Alessandro Garofalo

People walk between trulli, limestone buildings of Alberobello, a World Heritage Site, lit up with Christmas animations, as Italy goes back to a complete lockdown during Christmas season as part of efforts to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 23, 2020. Picture taken December 23, 2020. REUTERS/Alessandro Garofalo

A woman wearing a face mask, walks between trulli, limestone buildings of Alberobello, a World Heritage Site, lit up with Christmas animations, as Italy goes back to a complete lockdown during Christmas season as part of efforts to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 23, 2020. Picture taken December 23, 2020. REUTERS/Alessandro Garofalo

A woman walks between trulli, limestone buildings of Alberobello, a World Heritage Site, lit up with Christmas lights, as Italy goes back to a complete lockdown during Christmas season as part of efforts put in place to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 24, 2020. REUTERS/Alessandro Garofalo

A general view of trulli, limestone buildings of Alberobello, a World Heritage Site, lit up with Christmas lights, as Italy goes back to a complete lockdown during Christmas season as part of efforts to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 23, 2020. Picture taken December 23, 2020. REUTERS/Alessandro Garofalo

A general view of trulli, limestone buildings of Alberobello, a World Heritage Site, lit up with Christmas lights, as Italy goes back to a complete lockdown during Christmas season as part of efforts to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 23, 2020. Picture taken December 23, 2020. REUTERS/Alessandro Garofalo

A general view shows an empty street with trulli, limestone buildings of Alberobello, a World Heritage Site, lit up with Christmas lights, as Italy goes back to a complete lockdown during Christmas season as part of efforts to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 24, 2020. REUTERS/Alessandro Garofalo

A general view shows an empty street with trulli, limestone buildings of Alberobello, a World Heritage Site, lit up with Christmas lights, as Italy goes back to a complete lockdown during Christmas season as part of efforts to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 24, 2020. REUTERS/Alessandro Garofalo

A general view shows an empty street with trulli, limestone buildings of Alberobello, a World Heritage Site, lit up with Christmas lights, as Italy goes back to a complete lockdown during Christmas season as part of efforts to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 24, 2020. REUTERS/Alessandro Garofalo

A woman wearing a face mask, uses her phone in front of trulli, limestone buildings of Alberobello, a World Heritage Site, lit up with Christmas animations, as Italy goes back to a complete lockdown during Christmas season as part of efforts to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 23, 2020. Picture taken December 23, 2020. REUTERS/Alessandro Garofalo

People walk in front of trulli, limestone buildings of Alberobello, a World Heritage Site, lit up with Christmas animations, as Italy goes back to a complete lockdown during Christmas season as part of efforts to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 24, 2020. REUTERS/Alessandro Garofalo

People wearing face masks, stand in front of the famous trulli, limestone buildings of Alberobello, a World Heritage Site, lit up with Christmas animations, as Italy goes back to a complete lockdown during Christmas season as part of efforts to curb the spread of the coronavirus disease (COVID-19) in Alberobello, Italy, December 23, 2020. Picture taken December 23, 2020. REUTERS/Alessandro Garofalo

The famous trulli, or limestone, buildings of Alberobello, a World Heritage Site, are lit up with Christmas animations, as Italy goes back to a complete lockdown during Christmas season as part of efforts put in place to curb the spread of the coronavirus disease (COVID-19), in Alberobello, Italy, December 23, 2020. Picture taken December 23. REUTERS/Alessandro Garofalo

People wearing face masks walk in the old town of Alberobello, a World Heritage Site, as Italy goes back to a complete lockdown during Christmas season as part of efforts put in place to curb the spread of the coronavirus disease (COVID-19), in Alberobello, Italy December 23, 2020. Picture taken December 23. REUTERS/Alessandro Garofalo