Classical music has been around forever. Piano is such an integral part of it
I think classical music arose in the mid 1700's. I took a class on music an it talked about the broad span of classical music over the centuries.
I play the piano and of course even from the beginning you learn all the classical pieces.  But it takes a lifetime to truly master
That is awesome that you play the piano. I don't have any musical talent. It is an art form that does take time.
Who do you feel is the most prolific master of the classics
Pyotr Ilyich Tchaikovsky without a doubt. HIs name is legendary. He was a Russian composer of the romantic period. Do you know of him?
Of course, he was amazing and often had others such as Brahms conduct.  His ballets are renowned 
He died quite young. I think he died after one of his symphonies called "Pathetique".