Erich Wolfgang Korngold won the Oscar for this score in 1938 - the very first composer to receive the Academy Award. Before that, the Oscar went to the head of the Studio's music department. A child prodigy in Vienna be was a professor at the Vienna State Academy when the Nazis began their rise to power. Invited to Hollywood, he became one of their standout composers, writing the score for some of Errol Flynn's great swashbuckling epics (this one and Captain Blood).
Back at State U the Fencing Club did a fundraising movie series of swashbuckling films. They were all packed, and everyone had a great time. Check them out on NetFlix or Prime (or you can probably score a DVD on the cheap) - they're still great fun. And the music is top shelf.