The Spread of Enlightenment

Questions:
What made Wolfgang Amadeus Mozart's music famous during this time?
What are Salons?
When was the first Encylopedia published?
What made Frederick the Great famous?
What are the reasons Frederick the Great was known to be "great"?
Who was Joseph II?
What did he do that made him known to be famous?
Who was Catherine the Great?
What did she do that made her known to be famous?
What was the genere of music that was commonly listened to during this time?
Who wrote the novel Pamela?