A combination picture shows a view of Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, which was a Byzantine cathedral before being converted into a mosque and then to a museum, June 30, 2020 and the same spot as curtains covering Christian frescoes are pictured at Hagia Sophia Grand Mosque after Friday prayers, in Istanbul, Turkey July 24, 2020. REUTERS/Murad Sezer

Gli the cat of Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, is pictured at Hagia Sophia in Istanbul, Turkey July 2, 2020. Picture taken July 2, 2020. REUTERS/Murad Sezer

Gli the cat of Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, is pictured at Hagia Sophia in Istanbul, Turkey July 2, 2020. Picture taken July 2, 2020. REUTERS/Murad Sezer

People visit Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, in Istanbul, Turkey, June 30, 2020. Picture taken June 30, 2020. REUTERS/Murad Sezer

A mosaic depicting The Virgin Mary and Jesus is seen at Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, in Istanbul, Turkey, July 2, 2020. Picture taken July 2, 2020. REUTERS/Murad Sezer

People visit Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, in Istanbul, Turkey, July 10, 2020. Picture taken July 10, 2020. REUTERS/Murad Sezer

Visitors look at mosaics at Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, in Istanbul, Turkey, August 3, 2017. Picture taken August 3, 2017. REUTERS/Murad Sezer

Local and foreign tourists visit Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, in Istanbul, Turkey, August 3, 2017. Picture taken August 3, 2017. REUTERS/Murad Sezer

Visitors pose for a picture at Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, in Istanbul, Turkey, July 10, 2020. Picture taken July 10, 2020. REUTERS/Murad Sezer

Visitors look at mosaics at Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, in Istanbul, Turkey, August 3, 2017. Picture taken August 3, 2017. REUTERS/Murad Sezer

People carry a Turkish flag outside the Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, which was a Byzantine cathedral before being converted into a mosque and currently a museum, in Istanbul, Turkey, July 10, 2020. REUTERS/Murad Sezer

People carry Turkish flags outside the Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, which was a Byzantine cathedral before being converted into a mosque and currently a museum, in Istanbul, Turkey, July 10, 2020. REUTERS/Murad Sezer

People visit the Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, which was a Byzantine cathedral before being converted into a mosque and currently a museum, in Istanbul, Turkey, July 10, 2020. REUTERS/Murad Sezer

People visit the Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, which was a Byzantine cathedral before being converted into a mosque and currently a museum, in Istanbul, Turkey, July 10, 2020. REUTERS/Murad Sezer

People visit the Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, which was a Byzantine cathedral before being converted into a mosque and currently a museum, in Istanbul, Turkey, July 10, 2020. REUTERS/Murad Sezer

Marta Kulbaczewska, a visitor from Poland, poses for a picture at Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, which was a Byzantine cathedral before being converted into a mosque and currently a museum, in Istanbul, Turkey, July 10, 2020. REUTERS/Murad Sezer

Visitors pose for a picture at Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, which was a Byzantine cathedral before being converted into a mosque and currently a museum, in Istanbul, Turkey, July 10, 2020. REUTERS/Murad Sezer

Visitors pose for a picture at Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, which was a Byzantine cathedral before being converted into a mosque and currently a museum, in Istanbul, Turkey, July 10, 2020. REUTERS/Murad Sezer

A man walks in Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, which was a Byzantine cathedral before being converted into a mosque and currently a museum, in Istanbul, Turkey, July 10, 2020. REUTERS/Murad Sezer

People walk past Hagia Sophia, or Ayasofya, a UNESCO World Heritage site that was a Byzantine cathedral before being converted into a mosque, which is currently a museum, in Istanbul, Turkey, July 8, 2020. REUTERS/Murad Sezer

Gli the cat of Hagia Sophia or Ayasofya, a UNESCO World Heritage Site which was a Byzantine cathedral before it was converted into a mosque and currently a museum, is pictured in Istanbul, Turkey, July 2, 2020. REUTERS/Murad Sezer

A visitor poses for a souvenir picture at the Hagia Sophia or Ayasofya, a UNESCO World Heritage Site which was a Byzantine cathedral before it was converted into a mosque and currently a museum, in Istanbul, Turkey, July 2, 2020. REUTERS/Murad Sezer

People pose for a selfie as they visit the Hagia Sophia or Ayasofya, a UNESCO World Heritage Site which was a Byzantine cathedral before it was converted into a mosque and currently a museum, in Istanbul, Turkey, July 2, 2020. REUTERS/Murad Sezer

TV journalists report in front of the Hagia Sophia or Ayasofya, a UNESCO World Heritage Site which was a Byzantine cathedral before it was converted into a mosque and currently a museum, in Istanbul, Turkey, July 2, 2020. REUTERS/Murad Sezer

People visit the Hagia Sophia or Ayasofya, a UNESCO World Heritage Site which was a Byzantine cathedral before it was converted into a mosque and currently a museum, in Istanbul, Turkey, July 2, 2020. REUTERS/Murad Sezer

A cyclist rides past the Hagia Sophia or Ayasofya, a UNESCO World Heritage Site which was a Byzantine cathedral before it was converted into a mosque and currently a museum, in Istanbul, Turkey, July 2, 2020. REUTERS/Murad Sezer

Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, that was a Byzantine cathedral before being converted into a mosque which is currently a museum, is seen in Istanbul, Turkey, June 28, 2020. Picture taken June 28, 2020. Picture taken with a drone. Picture taken June 28, 2020. REUTERS/Murad Sezer

Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, that was a Byzantine cathedral before being converted into a mosque which is currently a museum, is seen in Istanbul, Turkey, June 28, 2020. Picture taken June 28, 2020. Picture taken with a drone. REUTERS/Murad Sezer

Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, that was a Byzantine cathedral before being converted into a mosque which is currently a museum, is seen in Istanbul, Turkey, June 28, 2020. Picture taken June 28, 2020. Picture taken with a drone. Picture taken June 28, 2020. REUTERS/Murad Sezer

Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, that was a Byzantine cathedral before being converted into a mosque which is currently a museum, is seen in Istanbul, Turkey, June 28, 2020. Picture taken June 28, 2020. Picture taken with a drone. Picture taken June 28, 2020. REUTERS/Murad Sezer

People visit Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, which was a Byzantine cathedral before being converted into a mosque which is currently a museum, in Istanbul, Turkey, June 30, 2020. REUTERS/Murad Sezer

People visit Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, which was a Byzantine cathedral before being converted into a mosque which is currently a museum, in Istanbul, Turkey, June 30, 2020. REUTERS/Murad Sezer

People visit Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, which was a Byzantine cathedral before being converted into a mosque which is currently a museum, in Istanbul, Turkey, June 30, 2020. REUTERS/Murad Sezer

People visit Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, which was a Byzantine cathedral before being converted into a mosque which is currently a museum, in Istanbul, Turkey, June 30, 2020. REUTERS/Murad Sezer

A view of Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, which was a Byzantine cathedral before being converted into a mosque which is currently a museum, in Istanbul, Turkey, June 30, 2020. REUTERS/Murad Sezer

People visit Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, which was a Byzantine cathedral before being converted into a mosque which is currently a museum, in Istanbul, Turkey, June 30, 2020. REUTERS/Murad Sezer

People visit Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, which was a Byzantine cathedral before being converted into a mosque which is currently a museum, in Istanbul, Turkey, June 30, 2020. REUTERS/Murad Sezer

People visit Hagia Sophia or Ayasofya, a UNESCO World Heritage Site, which was a Byzantine cathedral before being converted into a mosque which is currently a museum, in Istanbul, Turkey, June 30, 2020. REUTERS/Murad Sezer

The UNESCO World Heritage site Sanssouci Palace is illuminated in red light to protest against the lockdown due to the coronavirus disease (COVID-19), during the "Nights of Lights" in Potsdam, Germany, June 22, 2020. REUTERS/Annegret Hilse

The UNESCO World Heritage site Sanssouci Palace is illuminated in red light to protest against the lockdown due to the coronavirus disease (COVID-19), during the "Nights of Lights" in Potsdam, Germany, June 22, 2020. REUTERS/Annegret Hilse

The UNESCO World Heritage site Sanssouci Palace is illuminated in red light to protest against the lockdown due to the coronavirus disease (COVID-19), during the "Nights of Lights" in Potsdam, Germany, June 22, 2020. REUTERS/Annegret Hilse

The UNESCO World Heritage site Sanssouci Palace is illuminated in red light to protest against the coronavirus disease (COVID-19) lockdown, during the "Night of Light" in Potsdam, Germany, June 22, 2020. REUTERS/Annegret Hilse TPX IMAGES OF THE DAY

Swayambhunath Stupa, a UNESCO world heritage site, surrounded by a densely built-up area is seen as pollution level drops on the forty-second day of the lockdown imposed by the government amid concerns about the spread of the coronavirus disease (COVID-19) outbreak, in Kathmandu, Nepal May 4, 2020. REUTERS/Navesh Chitrakar TPX IMAGES OF THE DAY

A man stands at a deserted street along Taleju Temple at Kathmandu Durbar Square, a UNESCO world heritage site, during the thirty-eight day of the lockdown imposed by the government amid concerns about the spread of coronavirus disease (COVID-19) outbreak, in Kathmandu, Nepal April 30, 2020. REUTERS/Navesh Chitrakar

A police vehicle sanitises Piazza Duomo, a UNESCO world heritage site in the Sicilian port city of Catania, as the spread of the coronavirus disease (COVID-19) continues, in Catania, Italy, April 18, 2020. REUTERS/Antonio Parrinello

The inside of a police vehicle that is used to sanitise Piazza Duomo, a UNESCO world heritage site in the Sicilian port city of Catania, is seen as the spread of the coronavirus disease (COVID-19) continues, in Catania, Italy, April 18, 2020. REUTERS/Antonio Parrinello

A police vehicle sanitises Piazza Duomo, a UNESCO world heritage site in the Sicilian port city of Catania, as the spread of the coronavirus disease (COVID-19) continues, in Catania, Italy, April 18, 2020. REUTERS/Antonio Parrinello

A police vehicle sanitises Piazza Duomo, a UNESCO world heritage site in the Sicilian port city of Catania, as the spread of the coronavirus disease (COVID-19) continues, in Catania, Italy, April 18, 2020. REUTERS/Antonio Parrinello

A vehicle sanitises Piazza Duomo, a UNESCO world heritage site in the Sicilian port city of Catania, as the spread of the coronavirus disease (COVID-19) continues, in Catania, Italy, April 18, 2020. REUTERS/Antonio Parrinello

A police vehicle sanitises Piazza Duomo, a UNESCO world heritage site in the Sicilian port city of Catania, while councilor for the environment of Catania Fabio Cantarella (R) watches as the spread of the coronavirus disease (COVID-19) continues, in Catania, Italy, April 18, 2020. REUTERS/Antonio Parrinello

A police vehicle sanitises Piazza Duomo, a UNESCO world heritage site in the Sicilian port city of Catania, while councilor for the environment of Catania Fabio Cantarella (R) watches as the spread of the coronavirus disease (COVID-19) continues, in Catania, Italy, April 18, 2020. REUTERS/Antonio Parrinello

A police vehicle sanitises Piazza Duomo, a UNESCO world heritage site in the Sicilian port city of Catania, while councilor for the environment of Catania Fabio Cantarella (R) watches as the spread of the coronavirus disease (COVID-19) continues, in Catania, Italy, April 18, 2020. REUTERS/Antonio Parrinello

A police vehicle sanitises Piazza Duomo, a UNESCO world heritage site in the Sicilian port city of Catania, while councilor for the environment of Catania Fabio Cantarella (R) watches as the spread of the coronavirus disease (COVID-19) continues, in Catania, Italy, April 18, 2020. REUTERS/Antonio Parrinello

A police vehicle sanitises Piazza Duomo, a UNESCO world heritage site in the Sicilian port city of Catania, as the spread of the coronavirus disease (COVID-19) continues, in Catania, Italy, April 18, 2020. REUTERS/Antonio Parrinello

A police vehicle sanitises Piazza Duomo, a UNESCO world heritage site in the Sicilian port city of Catania, as the spread of the coronavirus disease (COVID-19) continues, in Catania, Italy, April 18, 2020. REUTERS/Antonio Parrinello REFILE - CORRECTING LOCATION

A police vehicle sanitises Piazza Duomo, a UNESCO world heritage site in the Sicilian port city of Catania, as the spread of the coronavirus disease (COVID-19) continues, in Catania, Italy, April 18, 2020. REUTERS/Antonio Parrinello REFILE - CORRECTING LOCATION

The sun rises behind the Swayambhunath Stupa, a UNESCO world heritage site, during the sixteenth day of the lockdown imposed by the government amid concerns about the spread of the coronavirus disease (COVID-19) in Kathmandu, Nepal, April 8, 2020. REUTERS/Navesh Chitrakar

A deserted view of Boudhanath Stupa, a UNESCO world heritage site, following the lockdown imposed by the government amid concerns about the spread of coronavirus disease (COVID-19) outbreak, in Kathmandu, Nepal March 25, 2020. REUTERS/Navesh Chitrakar

A woman covers her face as she walks along the almost deserted Patan Durbar Square, a UNESCO world heritage site, following the lockdown imposed by the government amid concerns about the spread of coronavirus disease (COVID-19) outbreak, in Kathmandu, Nepal March 24, 2020. REUTERS/Navesh Chitrakar

A man feeds pigeons at Patan Durbar Square, a UNESCO world heritage site, following the lockdown imposed by the government amid concerns about the spread of coronavirus disease (COVID-19) outbreak, in Kathmandu, Nepal March 24, 2020. REUTERS/Navesh Chitrakar