Misc: Name for an idler in fashionable society?

Questions

In what city did Chopin die in 1849?

On what opera was Puccini working when he died in 1924?

Vivaldi's Four Seasons concertos feature which solo instrument?

The work of which artist inspired Mussorssky's Pictures at anExhibition?

What is the nickname of Beethoven's Piano Concerto No. 5?