I believe it’s late 19th century, possibly a work by Tchaikovsky. One part sounds remarkably like the theme song of a ***Peanuts ***special, the one that goes
*You’re in love, Charlie Brown!
You’re in love, Charlie Brown!
You’ll have your day,
she’ll come your way!
You’re in love … Charlie Brown! *
The classical piece is very gentle, and slows gradually toward the end.
The only thing it reminds me of is All Blues by Miles Davis which of course isn’t classical, but is classic. Or, going way out on a limb, it vaguely hints at, at least in my mind, Fantasia on a theme by Thomas Tallisby Vaughn Williams.