Medieval
Yes, you read it right. Actual medieval music. (circa 500 to 1500 AD)
I’ve always found it easier, better, and less expensive to produce the music that is needed as opposed to trying to find it in a library or trying to license it. That was the case here. These public domain pieces are so old that no one even knows who composed them. I got an amazing medieval group called “Ensemble Alcatraz” to record them and they turned out great.