Thanks for the kindly suggestions, but it's none of those.

By the way, I downloaded a bergamasca to play with my friends. It's a fun form, in which the accompaniment plays the same four chords over and over. In the video, a guitarist just strummed them throughout. Our accompanists, being modern, stuck to the same chords but varied the manner of playing - strumming, picking, octaves, using different timings.

They said the name comes from the town of Bergamo, but I think it comes from Bergermeister. It sounds like Dutchmen dancing.
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The passacaglia represent musicians passing through the alleys of an ancient city, quietly playing their instruments at the end of the night. I heard a passacaglia played by the faculty of a workshop in Texas, and it was one of the most beautiful pieces of music I have ever heard.