Beautiful Don, thank you. 40 part polyphony - as far as I'm aware that's as complicated as it's ever got. If the human mind could come up with that in 1570, I reckon the 'peasants' would have been able to stick three chords behind a simple ditty. To assume otherwise is plain daft.

There was actually a German bloke much later who wrote another part to it, but he was probably just showing off..