A man visits an exhibition commemorating the 250th anniversary of the birth of composer and pianist Ludwig van Beethoven at the Kunsthistorisches Museum in Vienna, Austria, Oct. 1, 2020. (Photo by Georges Schneider/Xinhua)

A man visits an exhibition commemorating the 250th anniversary of the birth of composer and pianist Ludwig van Beethoven at the Kunsthistorisches Museum in Vienna, Austria, Oct. 1, 2020. (Photo by Georges Schneider/Xinhua)

A man visits an exhibition commemorating the 250th anniversary of the birth of composer and pianist Ludwig van Beethoven at the Kunsthistorisches Museum in Vienna, Austria, Oct. 1, 2020. (Photo by Georges Schneider/Xinhua)

People visit an exhibition commemorating the 250th anniversary of the birth of composer and pianist Ludwig van Beethoven at the Kunsthistorisches Museum in Vienna, Austria, Oct. 1, 2020. (Photo by Georges Schneider/Xinhua)

People visit an exhibition commemorating the 250th anniversary of the birth of composer and pianist Ludwig van Beethoven at the Kunsthistorisches Museum in Vienna, Austria, Oct. 1, 2020. (Photo by Georges Schneider/Xinhua)