Opera The HD video opera transmissions are presented via the same HD digital cinema projectors used for major Hollywood films. European opera houses and festivals including the Royal Opera in London, La Scala in Milan, the Salzburg Festival, La Fenice in Venice, and the Maggio Musicale in Florence have also transmitted their productions to theaters in cities around the world since 2006, including 90 cities in the U.S. The emergence of the Internet has also affected the way in which audiences consume opera. In 2009 the British Glyndebourne Festival Opera offered for the first time an online digital video download of
Cologne Opera former mayor of Cologne. The first opera to be performed there was Carl Maria von Weber's "Oberon". In June of that year the house saw its first world premiere, Wolfgang Fortner's "Die Bluthochzeit". The following month the opera company of La Scala appeared there on tour with Maria Callas in "La sonnambula". The Cologne Opera House occasionally hosts solo recitals and special events; one remarkable such event was concert by jazz pianist Keith Jarrett in 1975 which was recorded and became one of the most popular solo jazz piano recordings of all time, known as The Köln Concert. The house