Activists stage a protest outside the La Scala theater on the occasion of the opening season gala, in Milan, Italy, Friday, Dec. 7, 2018. (AP Photo/Luca Bruno)

Anti-government activists light flares as they stage a protest outside the La Scala theater on the occasion of the opening season gala, in Milan, Italy, Friday, Dec. 7, 2018. (AP Photo/Luca Bruno)

Activists stage a protest outside the La Scala theater on the occasion of the opening season gala, in Milan, Italy, Friday, Dec. 7, 2018. (AP Photo/Luca Bruno)

Activists stage a protest outside the La Scala theater on the occasion of the opening season gala, in Milan, Italy, Friday, Dec. 7, 2018. (AP Photo/Luca Bruno)

Activists stage a protest outside the La Scala theater on the occasion of the opening season gala, in Milan, Italy, Friday, Dec. 7, 2018. (AP Photo/Luca Bruno)

Police officers in dress uniform stand outside La Scala opera house in Milan, Italy, Friday, Dec. 7, 2018. La Scala's season premiere of a new production of Verdi's "Attila" takes on contemporary themes of male leaders selling out to self-interest while the final act of heroism falls to a woman. The gala event every Dec. 7 is one of the highlights of the European cultural calendar. This year, President Sergio Mattarella plans to attend his first season premiere. None of Italy's populist political leaders are expected. (AP Photo/Antonio Calanni)

Italian President Sergio Mattarella arrives at La Scala opera house in Milan, Italy, Friday, Dec. 7, 2018. La Scala's season premiere of a new production of Verdi's "Attila" takes on contemporary themes of male leaders selling out to self-interest while the final act of heroism falls to a woman. The gala event every Dec. 7 is one of the highlights of the European cultural calendar. This year, President Sergio Mattarella plans to attend his first season premiere. None of Italy's populist political leaders are expected. (AP Photo/Antonio Calanni)

La Scala's general manager Alexander Pereira arrives at Milan's opera house, Italy, Friday, Dec. 7, 2018. La Scala's season premiere of a new production of Verdi's "Attila" takes on contemporary themes of male leaders selling out to self-interest while the final act of heroism falls to a woman. The gala event every Dec. 7 is one of the highlights of the European cultural calendar. (AP Photo/Antonio Calanni)

Italian President Sergio Mattarella arrives at La Scala opera house in Milan, Italy, Friday, Dec. 7, 2018. La Scala's season premiere of a new production of Verdi's "Attila" takes on contemporary themes of male leaders selling out to self-interest while the final act of heroism falls to a woman. The gala event every Dec. 7 is one of the highlights of the European cultural calendar. This year, President Sergio Mattarella plans to attend his first season premiere. None of Italy's populist political leaders are expected. (AP Photo/Antonio Calanni)

La Scala's general manager Alexander Pereira and his wife Daniela Weisser De Sosa arrive at the Milan opera house, Italy, Friday, Dec. 7, 2018. La Scala's season premiere of a new production of Verdi's "Attila" takes on contemporary themes of male leaders selling out to self-interest while the final act of heroism falls to a woman. The gala event every Dec. 7 is one of the highlights of the European cultural calendar. This year, President Sergio Mattarella plans to attend his first season premiere. None of Italy's populist political leaders are expected. (AP Photo/Antonio Calanni)

People watch La Scala opera house's gala season opener, Giuseppe Verdi's opera 'Attila', on a giant screen set in the Vittorio Emanuele gallery, in Milan, Italy, Friday, Dec. 7, 2018. La Scala's season premiere of a new production of Verdi's "Attila" takes on contemporary themes of male leaders selling out to self-interest while the final act of heroism falls to a woman. The gala event every Dec. 7 is one of the highlights of the European cultural calendar. (AP Photo/Luca Bruno)

People watch La Scala opera house's gala season opener, Giuseppe Verdi's opera 'Attila', on a giant screen set in the Vittorio Emanuele gallery, in Milan, Italy, Friday, Dec. 7, 2018. La Scala's season premiere of a new production of Verdi's "Attila" takes on contemporary themes of male leaders selling out to self-interest while the final act of heroism falls to a woman. The gala event every Dec. 7 is one of the highlights of the European cultural calendar. (AP Photo/Luca Bruno)

People watch La Scala opera house's gala season opener, Giuseppe Verdi's opera 'Attila', on a giant screen set in the Vittorio Emanuele gallery, in Milan, Italy, Friday, Dec. 7, 2018. La Scala's season premiere of a new production of Verdi's "Attila" takes on contemporary themes of male leaders selling out to self-interest while the final act of heroism falls to a woman. The gala event every Dec. 7 is one of the highlights of the European cultural calendar. (AP Photo/Luca Bruno)

La Scala's general manager Alexander Pereira arrives at Milan's opera house, Italy, Friday, Dec. 7, 2018. La Scala's season premiere of a new production of Verdi's "Attila" takes on contemporary themes of male leaders selling out to self-interest while the final act of heroism falls to a woman. The gala event every Dec. 7 is one of the highlights of the European cultural calendar. (AP Photo/Antonio Calanni)

A spectator arrives at the Milan La Scala opera house, Italy, Friday, Dec. 7, 2018. La Scala's season premiere of a new production of Verdi's "Attila" takes on contemporary themes of male leaders selling out to self-interest while the final act of heroism falls to a woman. The gala event every Dec. 7 is one of the highlights of the European cultural calendar. This year, President Sergio Mattarella plans to attend his first season premiere. None of Italy's populist political leaders are expected. (AP Photo/Antonio Calanni)