Turandot was an opera composed primarily by Giacomo Puccini, but which remained unfinished upon his death. Franco Alfano finished the opera based on Puccini's notes, under circumstances which struck the Eighth Doctor as "so sad." (TV: Doctor Who)
The Tenth Doctor once went to the Vienna State Opera to see Turandot. The alien Anton Mordillo was the star of the opera. (COMIC: The Great Mordillo)