A sign is pictured in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A medical staff member, wearing a face mask, takes a break in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A medical staff members, wearing face masks, are seen in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A medical staff member works in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A medical staff member, wearing a protective suit and face mask, is pictured in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A medical staff member gets ready to work in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A medical staff member, wearing a protective suit and face mask, works in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

Medical staff members, wearing face masks, take a break in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

Medical staff members, wearing face masks, are seen in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A medical staff member, wearing a protective suit and face mask, works in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A medical staff member, wearing a protective suit and face mask, works in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A medical staff member, wearing a protective suit and face mask, works in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

Medical staff members, wearing protective suits and face masks, work in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A medical staff member, wearing a protective suit and face mask, works in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A medical staff member, wearing a protective suit and face mask, works in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A medical staff member, wearing a protective suit and face mask, works in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

Medical staff members, wearing protective suits and masks, work in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

Medical staff members, wearing protective suits and masks, work in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A medical staff member, wearing a protective suit and mask, works in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A medical staff member, wearing a protective suit and mask, is reflected in a window as other works in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A medical staff member, wearing a protective suit and mask, works in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A patient undergoes rehabilitation in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

The feet of a patient are pictured in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A medical staff member, wearing a protective suit, works in an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A nurse, wearing a protective face mask, is pictured as she takes a break at an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A nurse, wearing a protective face mask, is reflected as she takes a break at an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A nurse is reflected as she takes a break at an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, as the spread of the coronavirus disease continues, France April 17, 2020. REUTERS/Christian Hartmann

A nurse wearing a protective face mask takes a break at an intensive care unit for coronavirus disease (COVID-19) patients at the Clinique de l'Orangerie private hospital in Strasbourg, France April 17, 2020. REUTERS/Christian Hartmann TPX IMAGES OF THE DAY

A two-wheeled cart is seen at the Orangerie of the Chateau de Menars, France November 6, 2017. The Chateau de Menars, home of French King Louis XV's mistress Madame de Pompadour (1721-1764) and muse of the current owner, Monacan businessman and art lover Edmond Baysari who bought it in 1983 and renovated it for more than 100 million dollars. After more than two decades of work to restore it to its former glory the “Chateau Pompadour de Menars” is now for sale. Picture taken November 6, 2017 REUTERS/Gonzalo Fuentes

Security guards patrol the grounds of The Orangery at Kensington Palace in London, Britain July 10, 2015. Nicky Hilton, the sister of Paris Hilton, is due to marry James Rothschild at the Orangery on Friday, local media reported. REUTERS/Peter Nicholls

Museum Director Marie-Paule Vial gives explanations as she looks at the paintings "Le Masque de la Folie " (1945, The Mask) (L), "Autoportrait au Singe" (1938, Self Portrait with a Monkey) (C), "En Pensant a la Mort" (1943, Thinking About Death) (R) by Mexican artist Frida Kahlo (1907-1954) during the presentation of the exhibition 'Frida Kahlo/Diego Rivera, Art in Fusion' at the Musee de l'Orangerie in Paris, October 7, 2013. The exhibition will run from October 9, 2013 to January 13, 2014. REUTERS/Philippe Wojazer (FRANCE - Tags: SOCIETY ENTERTAINMENT)

Museum Director Marie-Paule Vial gives explanations as she looks at the paintings "Autoportrait au Singe" (1938, Self Portrait with a Monkey) (L) and "En Pensant a la Mort" (1943, Thinking About Death) by Mexican artist Frida Kahlo (1907-1954) during the presentation of the exhibition 'Frida Kahlo/Diego Rivera, Art in Fusion' at the Musee de l'Orangerie in Paris, October 7, 2013. The exhibition will run from October 9, 2013 to January 13, 2014. REUTERS/Philippe Wojazer (FRANCE - Tags: SOCIETY ENTERTAINMENT)

Orsay Museum Press person Coralie David stands in front of the painting "Autoportrait au Petit Singe" (1945, Self-Portrait with Small Monkey) by Mexican artist Frida Kahlo (1907-1954) during the presentation of the exhibition 'Frida Kahlo/Diego Rivera, Art in Fusion' at the Musee de l'Orangerie in Paris, October 7, 2013. The exhibition will run from October 9, 2013 to January 13, 2014. REUTERS/Philippe Wojazer (FRANCE - Tags: SOCIETY ENTERTAINMENT)

Visitors take pictures of the painting "Autoportrait au Petit Singe" (1945, Self-Portrait with Small Monkey) by Mexican artist Frida Kahlo (1907-1954) during the presentation of the exhibition 'Frida Kahlo/Diego Rivera, Art in Fusion' at the Musee de l'Orangerie in Paris, October 7, 2013. The exhibition will run from October 9, 2013 to January 13, 2014. REUTERS/Philippe Wojazer (FRANCE - Tags: SOCIETY ENTERTAINMENT)

Beatrice Avanzi (L), paintings curator at Orsay museum, and Leila Jarbouai, drawings curator at Orsay museum, speak together as they look at the painting "Autoportrait a la Robe de Velours" (1926, Self Portrait in a velvet dress) by Mexican artist Frida Kahlo (1907-1954) during the presentation of the exhibition 'Frida Kahlo/Diego Rivera, Art in Fusion' at the Musee de l'Orangerie in Paris, October 7, 2013. The exhibition will run from October 9, 2013 to January 13, 2014. REUTERS/Philippe Wojazer (FRANCE - Tags: SOCIETY ENTERTAINMENT)

Beatrice Avanzi, paintings curator at Orsay museum, looks at the painting "La colonne Brisee" (1944, The Broken Column) by Mexican artist Frida Kahlo (1907-1954) during the presentation of the exhibition 'Frida Kahlo/Diego Rivera, Art in Fusion' at the Musee de l'Orangerie in Paris, October 7, 2013. The exhibition will run from October 9, 2013 to January 13, 2014. REUTERS/Philippe Wojazer (FRANCE - Tags: SOCIETY)

Visitors look at paintings by Mexican artist Frida Kahlo (1907-1954) during the presentation of the exhibition 'Frida Kahlo/Diego Rivera, Art in Fusion' at the Musee de l'Orangerie in Paris, October 7, 2013. Left to right, paintings are "Le Masque de la Folie " (1945, The Mask), "Autoportrait au Singe" (1938, Self Portrait with a Monkey), "En Pensant a la Mort" (1943, Thinking About Death) and "Autoportrait au Petit Singe" (1945, Self-Portrait with Small Monkey). The exhibition will run from October 9, 2013 to January 13, 2014. REUTERS/Philippe Wojazer (FRANCE - Tags: SOCIETY ENTERTAINMENT)

Potsdam Mayor Jann Jakobs (L) awards the M100 media prize to European Central Bank (ECB) President Mario Draghi (2nd L) at the Orangery Palace in Potsdam, September 6, 2012. European Central Bank President Draghi has delivered a roadmap for rescuing the euro zone from potential meltdown but the onus is now on Spain to swallow its pride and apply for help to bring down crippling borrowing costs. Also pictured are Deutsche Bank Supervisory Board Chairman Paul Achleitner (2nd R) and Ferrari carmaker chairman Luca Di Montezemolo (R). REUTERS/Klaus-Dietmar Gabbert/Pool (GERMANY - Tags: POLITICS BUSINESS MEDIA)

Members of the English National Ballet pose with canvases outside The Orangery at Kensington Palace in London May 22, 2012. They were publicising a charity fundraising celebrity art auction to be held at the palace in the summer with Swan Lake as the theme. REUTERS/Toby Melville (BRITAIN - Tags: ENTERTAINMENT SOCIETY)

Members of the English National Ballet pose outside The Orangery restaurant at Kensington Palace in London May 22, 2012, as part of a publicity event for a summer charity fundraiser with Swan Lake as the theme. REUTERS/Toby Melville (BRITAIN - Tags: SOCIETY ENTERTAINMENT)

Self-portraits by Italian futurist and neo-classic artist Gino Severini,1883-1966, are seen at the Orangerie Museum in Paris April 26, 2011. The exhibit is open to the public from April 27 to July 25. REUTERS/Charles Platiau (FRANCE - Tags: SOCIETY)

A visitor looks at paintings, 'Femme a la Mandoline' (L) and 'Les joueurs de Cartes' (R) by Italian futurist and neo-classic artist Gino Severini,1883-1966, at the Orangerie Museum in Paris April 26, 2011. The exhibit is open to the public from April 27 to July 25. REUTERS/Charles Platiau (FRANCE - Tags: SOCIETY)

A visitor looks at paintings, 'Contrastes de Matieres Vivantes' (L) and 'Arlequin (Portrait de Nino Frachini') (R) by Italian futurist and neo-classic artist Gino Severini,1883-1966, at the Orangerie Museum in Paris April 26, 2011. The exhibit is open to the public from April 27 to July 25. REUTERS/Charles Platiau (FRANCE - Tags: SOCIETY)

A museum guard sits near paintings, 'La famille du pauvre Pierrot' (L) and 'Portrait de la Famille Severini' (R) by Italian futurist and neo-classic artist Gino Severini,1883-1966, at the Orangerie Museum in Paris April 26, 2011. The exhibit is open to the public from April 27 to July 25. REUTERS/Charles Platiau (FRANCE - Tags: SOCIETY)

Final preparations are made near the paintings, 'Le Marchand d'Oublies' (L) and 'le Sillon' (R) by Italian futurist and neo-classic artist Gino Severini,1883-1966, at the Orangerie Museum in Paris April 26, 2011. The exhibit is open to the public from April 27 to July 25. REUTERS/Charles Platiau (FRANCE - Tags: SOCIETY)

Visitors looks at paintings, 'Le Marchand d'Oublies' (L) and 'le Sillon' (R) by Italian futurist and neo-classic artist Gino Severini,1883-1966, at the Orangerie Museum in Paris April 26, 2011. The exhibit is open to the public from April 27 to July 25. REUTERS/Charles Platiau (FRANCE - Tags: SOCIETY)

A police sniper is seen on the roof of the Orangerie near Sanssouci Palace in Potsdam eastern Germany, before the award ceremony of the M100 media prize 2010 for Danish cartoonist Kurt Westergaard September 8, 2010. The 75-year-old cartoonist Westergaard, whose drawings of Mohammed that offended Muslims worldwide first appeared in Danish paper Jyllands-Posten in 2005, was due to receive a prize on Wednesday evening at a conference on freedom of the press. REUTERS/Odd Andersen (GERMANY - Tags: MILITARY POLITICS RELIGION)

A police sniper is seen on the roof of the Orangerie near Sanssouci Palace in Potsdam eastern Germany, before the award ceremony of the M100 media prize 2010 for Danish cartoonist Kurt Westergaard September 8, 2010. The 75-year-old cartoonist Westergaard, whose drawings of Mohammed that offended Muslims worldwide first appeared in Danish paper Jyllands-Posten in 2005, was due to receive a prize on Wednesday evening at a conference on freedom of the press. REUTERS/Odd Andersen (GERMANY - Tags: MILITARY POLITICS RELIGION)

Police snipers survey the surrounding from the roof of the Orangery in Sanssouci palace in Potsdam, September 8, 2010, where Danish cartoonist Kurt Westergaard is to receive the M100 media prize. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS CRIME LAW)

Police snipers survey the surrounding from the roof of the Orangery in Sanssouci palace in Potsdam, September 8, 2010, where Danish cartoonist Kurt Westergaard is to receive the M100 media prize. REUTERS/Thomas Peter (GERMANY - Tags: POLITICS CRIME LAW)

A model presents creations by French designer Stanislassia Klein for Stella Cadente in the Musee de l'Orangerie, which houses French painter Claude Monet's Nymphea's (Waterlillies), during her Spring/Summer 2008 ready-to-wear fashion collection in Paris October 2, 2007. REUTERS/Gonzalo Fuentes (FRANCE)

A model presents a creation by French designer Stanislassia Klein for Stella Cadente in the Musee de l'Orangerie, which houses French painter Claude Monet's Nymphea's (Waterlillies), during her Spring/Summer 2008 ready-to-wear fashion collection in Paris October 2, 2007. REUTERS/Gonzalo Fuentes (FRANCE)

Models present creations by French designer Stanislassia Klein for Stella Cadente in the Musee de l'Orangerie, which houses French painter Claude Monet's Nymphea's (Waterlillies), during her Spring/Summer 2008 ready-to-wear fashion collection in Paris October 2, 2007. REUTERS/Gonzalo Fuentes (FRANCE)

Models present creations by French designer Stanislassia Klein for Stella Cadente in the Musee de l'Orangerie, which houses French painter Claude Monet's Nymphea's (Waterlillies), during her Spring/Summer 2008 ready-to-wear fashion collection in Paris October 2, 2007. REUTERS/Gonzalo Fuentes (FRANCE)

A model presents a creation by French designer Stanislassia Klein for Stella Cadente in the Musee de l'Orangerie, which houses French painter Claude Monet's Nymphea's (Waterlillies), during her Spring/Summer 2008 ready-to-wear fashion collection in Paris October 2, 2007. REUTERS/Gonzalo Fuentes (FRANCE)

Models present creations by French designer Stanislassia Klein for Stella Cadente in the Musee de l'Orangerie, which houses French painter Claude Monet's Nymphea's (Waterlillies), during her Spring/Summer 2008 ready-to-wear fashion collection in Paris October 2, 2007. REUTERS/Gonzalo Fuentes (FRANCE)

Models present a creation by French designer Stanislassia Klein for Stella Cadente in the Musee de l'Orangerie, which houses French painter Claude Monet's Nymphea's (Waterlillies), during her Spring/Summer 2008 ready-to-wear fashion collection in Paris October 2, 2007. REUTERS/Gonzalo Fuentes (FRANCE)

U.S. First Lady Laura Bush looks at Claude Monet's "Les Nympheas" at the Musee de l'Orangerie in Paris January 15, 2007. Laura Bush is on a three-day visit in France. REUTERS/Benoit Tessier (FRANCE)

U.S. First Lady Laura Bush (2nd R), U.S. ambassador to France Craig Roberts Stapleton (2nd L) and his wife Debbie (L) listen to Director of the Musee de l'Orangerie Pierre Georgel (R) as they look at Claude Monet's "Les Nympheas" in the museum in Paris January 15, 2007. Laura Bush is on a three-day visit in France. REUTERS/Benoit Tessier (FRANCE)

U.S. First Lady Laura Bush looks at Claude Monet's "Les Nympheas" at the Musee de l'Orangerie in Paris January 15, 2007. Laura Bush is on a three-day visit in France. REUTERS/Benoit Tessier (FRANCE)