The Paris Compressed-Air Power Network (2018)
Another interesting method for power transmission in the early days of industrialization was the line shaft (<a href="https://en.wikipedia.org/wiki/Line_shaft" rel="nofollow">https://en.wikipedia.org/wiki/Line_shaft</a>). These were used only for a single factory, not for a whole city, though. You can see these if you go visit old textile plants in New England, for example.