Conductor Daniel Barenboim and the orchestra receive a standing ovation after a concert for peace in support of humanitarian aid for the people of Ukraine at the State Opera Unter den Linden following the Russia's invasion of Ukraine, in Berlin, Germany, March 6, 2022. REUTERS/Annegret Hilse 

Conductor Daniel Barenboim gestures after a concert for peace in support of humanitarian aid for the people of Ukraine at the State Opera Unter den Linden following the Russia's invasion of Ukraine, in Berlin, Germany, March 6, 2022. REUTERS/Annegret Hilse 

Conductor Daniel Barenboim gestures after a concert for peace in support of humanitarian aid for the people of Ukraine at the State Opera Unter den Linden following the Russia's invasion of Ukraine, in Berlin, Germany, March 6, 2022. REUTERS/Annegret Hilse 

Conductor Daniel Barenboim looks on after a concert for peace in support of humanitarian aid for the people of Ukraine at the State Opera Unter den Linden following the Russia's invasion of Ukraine, in Berlin, Germany, March 6, 2022. REUTERS/Annegret Hilse 

German violinist Anne-Sophie Mutter performs with Berlin's Staatsoper at an open-air concert conducted by Daniel Barenboim in Berlin, Germany September 6, 2020. Tobias Schwarz/Pool via REUTERS 

German violinist Anne-Sophie Mutter performs with Berlin's Staatsoper at an open-air concert conducted by Daniel Barenboim in Berlin, Germany September 6, 2020. Tobias Schwarz/Pool via REUTERS 

German violinist Anne-Sophie Mutter performs with Berlin's Staatsoper at an open-air concert conducted by Daniel Barenboim in Berlin, Germany September 6, 2020. Tobias Schwarz/Pool via REUTERS 

German violinist Anne-Sophie Mutter performs with Berlin's Staatsoper at an open-air concert conducted by Daniel Barenboim in Berlin, Germany September 6, 2020. Tobias Schwarz/Pool via REUTERS 

German violinist Anne-Sophie Mutter performs with Berlin's Staatsoper at an open-air concert conducted by Daniel Barenboim in Berlin, Germany September 6, 2020. Tobias Schwarz/Pool via REUTERS 

German violinist Anne-Sophie Mutter performs with Berlin's Staatsoper at an open-air concert conducted by Daniel Barenboim in Berlin, Germany September 6, 2020. Tobias Schwarz/Pool via REUTERS 

German Violinist Anne-Sophie Mutter performs with Berlin's Staatsoper at an open-air concert conducted by Daniel Barenboim in Berlin, Germany September 6, 2020. Tobias Schwarz/Pool via REUTERS 

A general overview shows the Bebel square as conductor Daniel Barenboim and Berlin's Staatsoper stage an open-air concert in Berlin, Germany September 6, 2020. Tobias Schwarz/Pool via REUTERS 

Conductor Daniel Barenboim and Berlin's Staatsoper stage an open-air concert in Berlin, Germany September 6, 2020. Tobias Schwarz/Pool via REUTERS 

Conductor Daniel Barenboim and Berlin's Staatsoper stage an open-air concert in Berlin, Germany September 6, 2020. Tobias Schwarz/Pool via REUTERS 

Conductor Daniel Barenboim and Berlin's Staatsoper stage an open-air concert in Berlin, Germany September 6, 2020. Tobias Schwarz/Pool via REUTERS 

Conductor Daniel Barenboim and Berlin's Staatsoper stage an open-air concert in Berlin, Germany September 6, 2020. Tobias Schwarz/Pool via REUTERS 

Conductor Daniel Barenboim and Berlin's Staatsoper stage an open-air concert in Berlin, Germany September 6, 2020. Tobias Schwarz/Pool via REUTERS 

Daniel Barenboim conducts during a ceremony marking the 30th anniversary of the fall of the Berlin Wall at Brandenburg Gate in Berlin, Germany, November 9, 2019. REUTERS/Fabrizio Bensch 

Daniel Barenboim conducts during a ceremony marking the 30th anniversary of the fall of the Berlin Wall at Brandenburg Gate in Berlin, Germany, November 9, 2019. REUTERS/Fabrizio Bensch 

Britain's Prince Charles is welcomed by CEO of Daniel Barenboim Foundation, Uruguayan-German conductor Tabare Perlas, as they visit the Barenboim-Said Academy in Berlin, Germany, May 9, 2019. REUTERS/Fabrizio Bensch/Pool 

Britain's Prince Charles is welcomed by CEO of Daniel Barenboim Foundation, Uruguayan-German conductor Tabare Perlas, as they visit the Barenboim-Said Academy in Berlin, Germany, May 9, 2019. REUTERS/Fabrizio Bensch/Pool 

Britain's Prince Charles is welcomed by CEO of Daniel Barenboim Foundation, Uruguayan-German conductor Tabare Perlas, as they visit the Barenboim-Said Academy in Berlin, Germany, May 9, 2019. REUTERS/Fabrizio Bensch/Pool 

Conductor Daniel Barenboim poses at the renovated Staatsoper opera house before its reopening in Berlin, Germany September 29, 2017. REUTERS/Axel Schmidt 

Conductor Daniel Barenboim poses at the renovated Staatsoper opera house before its reopening in Berlin, Germany September 29, 2017. REUTERS/Axel Schmidt 

Conductor Daniel Barenboim poses at the renovated Staatsoper opera house before its reopening in Berlin, Germany September 29, 2017. REUTERS/Axel Schmidt 

Carabinieris stand inside La Scala opera house on the first day of opera season in downtown Milan December 7, 2014. "Fidelio" of Ludwig van Beethoven, directed by Daniel Barenboim, will open for the 2014 opera season at opera house. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT BUSINESS POLITICS) 

International Monetary Fund Managing Director Christine Lagarde arrives at La Scala opera house on the first day of opera season in downtown Milan December 7, 2014. "Fidelio" of Ludwig van Beethoven, directed by Daniel Barenboim, will open for the 2014 opera season at opera house. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT BUSINESS POLITICS) 

Carabinieri police keep guard in front of La Scala opera house on the first day of opera season in downtown Milan December 7, 2014. "Fidelio" of Ludwig van Beethoven, directed by Daniel Barenboim, will open for the 2014 opera season at opera house. As with previous years, demonstrations would take place on opening night as a way of highlighting protesters' demands and various issues in the country. REUTERS/Alessandro Garofalo (ITALY - Tags: CIVIL UNREST) 

Conductor Daniel Barenboim is seen on video screens as he conducts the State Orchestra performing in front of the Brandenburg Gate in Berlin, November 9, 2014. Germany on Sunday marks the 25th anniversary of the fall of the Berlin Wall. REUTERS/Fabrizio Bensch (GERMANY - Tags: POLITICS ANNIVERSARY SOCIETY TPX IMAGES OF THE DAY) 

People applaud as they attend a concert by Israeli-Argentine musician Daniel Barenboim and his West-Eastern Divan orchestra, which includes Arab and Israeli musicians, in Buenos Aires, August 10, 2014. REUTERS/Marcos Brindicci (ARGENTINA - Tags: ENTERTAINMENT SOCIETY) 

Israeli-Argentine musician Daniel Barenboim conducts his West-Eastern Divan orchestra, which includes Arab and Israeli musicians, during a free concert in Buenos Aires, August 10, 2014. REUTERS/Marcos Brindicci (ARGENTINA - Tags: ENTERTAINMENT SOCIETY) 

Israeli-Argentine musician Daniel Barenboim conducts his West-Eastern Divan orchestra, which includes Arab and Israeli musicians, during a free concert in Buenos Aires, August 10, 2014. REUTERS/Marcos Brindicci (ARGENTINA - Tags: ENTERTAINMENT SOCIETY) 

Israeli-Argentine conductor Daniel Barenboim (C) gestures as he and his West-Eastern Divan orchestra musicians, which includes Arab and Israeli musicians, pose for a picture at the end of a free concert in Buenos Aires, August 10, 2014. REUTERS/Marcos Brindicci (ARGENTINA - Tags: ENTERTAINMENT SOCIETY) 

Israeli-Argentine conductor Daniel Barenboim (centre R) watches musicians from his West-Eastern Divan orchestra, which includes Arab and Israeli musicians, at the end of a free concert in Buenos Aires, August 10, 2014. REUTERS/Marcos Brindicci (ARGENTINA - Tags: ENTERTAINMENT SOCIETY) 

Israeli-Argentine conductor Daniel Barenboim acknowledges the audience during a free concert with his West-Eastern Divan orchestra, which includes Arab and Israeli musicians, in Buenos Aires, August 10, 2014. REUTERS/Marcos Brindicci (ARGENTINA - Tags: ENTERTAINMENT SOCIETY) 

Israeli-Argentine conductor Daniel Barenboim and his West-Eastern Divan orchestra, which includes Arab and Israeli musicians, acknowledge the audience during a free concert in Buenos Aires, August 10, 2014. REUTERS/Marcos Brindicci (ARGENTINA - Tags: ENTERTAINMENT SOCIETY) 

Israeli-Argentine musician Daniel Barenboim conducts his West-Eastern Divan orchestra, which includes Arab and Israeli musicians, during a free concert in Buenos Aires, August 10, 2014. REUTERS/Marcos Brindicci (ARGENTINA - Tags: ENTERTAINMENT SOCIETY) 

Israeli-Argentine conductor Daniel Barenboim (R) speaks as people applaud during a free concert he gave with his West-Eastern Divan orchestra, which includes Arab and Israeli musicians, in Buenos Aires, August 10, 2014. REUTERS/Marcos Brindicci (ARGENTINA - Tags: ENTERTAINMENT SOCIETY) 

Israeli-Argentine conductor Daniel Barenboim (C) gestures as he and his West-Eastern Divan orchestra musicians, which includes Arab and Israeli musicians, pose for a picture at the end of a free concert in Buenos Aires, August 10, 2014. REUTERS/Marcos Brindicci (ARGENTINA - Tags: ENTERTAINMENT SOCIETY) 

A medallion worn by a theatre attendant is pictured at La Scala opera house in Milan December 7, 2012. La Scala opera house will open the 2012/2013 season with Richard Wagner's "Lohengrin", which is directed by Daniel Barenboim. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT) 

Actress Tea Falco of Italy and Alston Stephanus of Singapore, a fashion designer, poses for photographers as they arrive at La Scala opera house in Milan December 7, 2012. La Scala opera house will open the 2012/2013 season with Richard Wagner's "Lohengrin", which is directed by Daniel Barenboim. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT FASHION) 

Italian actress Tea Falco poses for photographers at La Scala opera house in Milan December 7, 2012. La Scala opera house will open the 2012/2013 season with Richard Wagner's "Lohengrin", which is directed by Daniel Barenboim. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT) 

Italian Carabinieri stand outside La Scala opera house during snowfall in Milan December 7, 2012. La Scala opera house will open the 2012/2013 season with Richard Wagner's "Lohengrin", which is directed by Daniel Barenboim. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT ENVIRONMENT) 

La Scala opera house is pictured during snowfall in Milan December 7, 2012. La Scala opera house will open the 2012/2013 season with Richard Wagner's "Lohengrin", which is directed by Daniel Barenboim. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT ENVIRONMENT) 

France's Culture Minister Aurelie Filippetti and supervisor of La Scala opera house Stephane Lissner pose for photographers in Milan December 7, 2012. La Scala opera house will open the 2012/2013 season with Richard Wagner's "Lohengrin", which is directed by Daniel Barenboim. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT POLITICS) 

Italy's Finance Minister Vittorio Grilli and and his girlfriend Alessia Ferruccio arrive at La Scala opera house in Milan December 7, 2012. La Scala opera house will open the 2012/2013 season with Richard Wagner's "Lohengrin", which is directed by Daniel Barenboim. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT POLITICS BUSINESS) 

FIAT brand manager Lapo Elkann and his girlfriend Goga Ashkenazi pose for photographers as they arrive at La Scala opera house in Milan December 7, 2012. La Scala opera house will open the 2012/2013 season with Richard Wagner's "Lohengrin", which is directed by Daniel Barenboim. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT TRANSPORT) 

FIAT brand manager Lapo Elkann and his girlfriend Goga Ashkenazi pose for photographers as they arrive at La Scala opera house in Milan December 7, 2012. La Scala opera house will open the 2012/2013 season with Richard Wagner's "Lohengrin", which is directed by Daniel Barenboim. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT TRANSPORT) 

Italian Prime Minister Mario Monti (L) arrives as he is welcomed by supervisor of La Scala opera house Stephane Lissner in Milan December 7, 2012. La Scala opera house will open the 2012/2013 season with Richard Wagner's "Lohengrin", which is directed by Daniel Barenboim. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT POLITICS) 

Italian Prime Minister Mario Monti (C) and his wife Elsa is welcomed by supervisor of La Scala opera house Stephane Lissner in Milan December 7, 2012. La Scala opera house will open the 2012/2013 season with Richard Wagner's "Lohengrin", which is directed by Daniel Barenboim. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT POLITICS) 

France's Culture Minister Aurelie Filippetti arrives at the La Scala opera house in Milan December 7, 2012. La Scala opera house will open the 2012/2013 season with Richard Wagner's "Lohengrin", which is directed by Daniel Barenboim. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT POLITICS) 

Italy's Minister of Economic Development, Infrastructure and Transport Corrado Passera and his wife Giovanna Salza arrive at La Scala opera house in Milan December 7, 2012. La Scala opera house will open the 2012/2013 season with Richard Wagner's "Lohengrin", which is directed by Daniel Barenboim. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT POLITICS) 

Italian Prime Minister Mario Monti arrives with his wife Elsa at the La Scala opera house in Milan December 7, 2012. La Scala opera house will open the 2012/2013 season with Richard Wagner's "Lohengrin", which is directed by Daniel Barenboim. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT POLITICS) 

Argentine conductor Daniel Barenboim directs Beethoven's ninth symphony in honor of Pope Benedict XVI (not pictured) at La Scala in Milan June 1, 2012. The Pope is in Milan for the 2012 World Family meeting. REUTERS/Daniel Dal Zennaro/Pool (ITALY - Tags: RELIGION) 

Director Daniel Barenboim (L) greets Pope Benedict XVI at La Scala theater at the end of a concert, in Milan, June 1, 2012. The Pope is in Milan for the 2012 World Family meeting. REUTERS/Daniel Dal Zennaro/Pool (ITALY - Tags: RELIGION) 

Carabinieri police stand guard in front of La Scala opera house in Milan December 7, 2011. Mozart's "Don Giovanni", conducted by director Daniel Barenboim , will open for the 2011 opera season at the La Scala opera house. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT SOCIETY) 

Mozart's " Don Giovanni" opera is seen on a screen in downtown Milan December 7, 2011. Mozart's "Don Giovanni", conducted by director Daniel Barenboim , will open for the 2011 opera season at the La Scala opera house. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT SOCIETY) 

People watch the " Don Giovanni" opera on a screen in downtown Milan December 7, 2011. Mozart's "Don Giovanni", conducted by director Daniel Barenboim , will open for the 2011 opera season at the La Scala opera house. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT SOCIETY) 

A general view is seen of La Scala opera house in Milan December 7, 2011. Mozart's "Don Giovanni", conducted by director Daniel Barenboim , will open for the 2011 opera season at the La Scala opera house. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT SOCIETY) 

Carabinieri police stand in front of La Scala opera house in Milan December 7, 2011. Mozart's "Don Giovanni", conducted by director Daniel Barenboim , will open for the 2011 opera season at the La Scala opera house. REUTERS/Alessandro Garofalo (ITALY - Tags: ENTERTAINMENT SOCIETY)