Misc: On This Day In January 1901 - The Commonwealth of ______ was founded.?

Questions

This pianist gave his first public performance in 1892, his last in 1976. ?

In what key did Franz Liszt write the beautiful Liebestraum #3 ?

What composer wrote "Finlandia" ?

In what Austrian city is an annual Mozart festival held ?

Alexander Scriabin(1872-1915), whose works include the symphonic poem "Prometheus", was known in his time for his: ?