I know that nothing is really "new" in this world and that everything you hear has been done once or even twice before, but I find it always very funny when I hear a piece from sixty, seventy or even more than a hundred years ago that sounds a bit like the minimal music we know from the last thirty years. I shall give a few examples:
Antonin Dvorak - Second Movement from the First String Quartet (when will the Kronos make a recording of it?)
Erik Satie -
Socrate (Philip Glass told us that he admired Jean Cocteau, but didn't he mean Satie?)
Aaron Copland -
The City (Oh, here's the thing John Adams got it all from!)
Colin McPhee -
Tabuh-Tabuhan (If he would have written it thirty years later and for 14 musicians, would it have become more famous?)
Do you know of any other examples?