What's the name of the background music from Caroline Fleming's party?

It's the classical music you can hear in the background while she's talking about her Mid-summer's eve party on the island.

I know that Martha Stewart in her original tv-series, "Martha Stewart Living" played the SAME EXACT CLASSICAL music piece, but I honestly have NEVER found out the actual name of the song and the composer.

Any ideas? Please help & thanks in advance! 

Dream until your dreams come true.