A visitor holds her umbrella close to a mural by Uruguayan artist Maria Noe during a guided visit to Quinta do Mocho neighbourhood in Sacavem, outskirts of Lisbon, on November 11, 2019. The image of a black woman removing her white-woman mask is one of the hundreds of murals that cover the buildings of the underprivileged district of Quinta de Mocho in Lisbon, that has been transformed by street art. (Photo by Patricia De Melo Moreira/AFP Photo)





Visitors watch a mural by Portuguese artist Odeith depicting Jamaican singer Bob Marley during a guided visit to Quinta do Mocho neighbourhood in Sacavem, outskirts of Lisbon, on November 11, 2019. (Photo by Patricia De Melo Moreira/AFP Photo)





A resident of Quinta do Mocho neighbourhood walk past a mural by French artist Stew, in Sacavem, outskirts of Lisbon, on November 11, 2019. (Photo by Patricia De Melo Moreira/AFP Photo)





Portuguese artist Acer poses with his dog in front of his mural in Quinta do Mocho neighbourhood in Sacavem, outskirts of Lisbon, on November 11, 2019. (Photo by Patricia De Melo Moreira/AFP Photo)





Visitors take pictures of a murals by Russian artist Zmock (L) and Portuguese artist Bordalo II (R) during a guided visit to Quinta do Mocho neighbourhood in Sacavem, outskirts of Lisbon, on November 11, 2019. (Photo by Patricia De Melo Moreira/AFP Photo)





Visitors watch a mural by Brazilian artist Vespa during a guided visit to Quinta do Mocho neighbourhood in Sacavem, outskirts of Lisbon, on November 11, 2019. (Photo by Patricia De Melo Moreira/AFP Photo)





A resident of Quinta do Mocho neighbourhood walks past murals by Liberian artist Arcy (L) and Portuguese artist Huariu, in Sacavem, outskirts of Lisbon, on November 11, 2019. (Photo by Patricia De Melo Moreira/AFP Photo)





Visitors take pictures of a mural by Uruguayan artist Licuado during a guided visit to Quinta do Mocho neighbourhood in Sacavem, outskirts of Lisbon, on November 11, 2019. (Photo by Patricia De Melo Moreira/AFP Photo)





Visitors watch a mural depicting United Nations Secretary General Antonio Guterres by Portuguese artist Sergio Odeith during a guided visit to Quinta do Mocho neighbourhood in Sacavem, outskirts of Lisbon, on November 11, 2019. (Photo by Patricia De Melo Moreira/AFP Photo)





People walk by a poster by Italian urban artist Salvatore Benintende aka “TVBOY” depecting Leonardo da Vinci's Mona Lisa wearing a protective facemask and holding a mobile phone reading “Mobile World Virus” in a street of Barcelona on February 18, 2020, a week after the World Mobile Congress was cancelled due to fears stemming from the coronavirus that sparked an exodus of industry heavyweights. (Photo by Pau Barrena/AFP Photo)





A child passes in front of a mural in Banda Aceh, Indonesia on February 12, 2020. (Photo by Chaideer Mahyuddin/AFP Photo)





A new work of art on the side of a house on Marsh Lane, Barton Hill, Bristol on February 13, 2020, which is thought to be by street artist Banksy. The black and white stencil of a girl with a catapult and the paint splat, made of roses and plastic flowers, is in the style of Banksy, but has yet to be confirmed as being the work of the artist. (Photo by Ben Birchall/PA Images via Getty Images)





A woman wearing a protective facemask cycles along a street in Shanghai on February 18, 2020. The World Health Organization has warned against a global over-reaction to the new coronavirus epidemic following panic-buying, event cancellations and concerns about cruise ship travel, as China's official death toll neared 1,900 on February 18. (Photo by Noel Celis/AFP Photo)





A man applies finishing touches to paintings of U.S. President Donald Trump and India's Prime Minister Narendra Modi on a wall as part of a beautification along a route that Trump and Modi will be taking during Trump's upcoming visit, in Ahmedabad, February 17, 2020. (Photo by Amit Dave/Reuters)





Fans gather around a mural of late NBA great Kobe Bryant and his daughter Gianna Bryant during a public memorial for them and seven others killed in a helicopter crash, at the Staples Center in Los Angeles, California, U.S., February 24, 2020. (Photo by Kyle Grillot/Reuters)





A mural of Greta Thunberg is seen on the side of a building, in Bristol, Britain, February 27, 2020. (Photo by Peter Nicholls/Reuters)





A woman walks past murals adorning the walls of Garibaldi subway station, in Milan, Friday, February 28, 2020. Due to the COVID-19 virus outbreak in northern Italy, the bustling metropolis of Milan has resembled more of a ghost town lately, as workers stayed home and tourism has dwindled there, and other parts of Italy. (Photo by Luca Bruno/AP Photo)





A man wears a face mask as he rides past a mural on a wall in Beijing, Saturday, March 7, 2020. Crossing more borders, the new coronavirus hit a milestone, infecting more than 100,000 people worldwide as it wove itself deeper into the daily lives of millions, infecting the powerful, the unprotected poor and vast masses in between. (Photo by Mark Schiefelbein/AP Photo)





Residents walk past a mural painted on a building at a slum clearance board residential community in Chennai on February 18, 2020. (Photo by Arun Sankar/AFP Photo)





People wearing masks as a precaution against the COVID-19 illness walk near a wall painting of martial arts star Bruce Lee, in Hong Kong, Sunday, March 8, 2020. (Photo by Kin Cheung/AP Photo)