I watched Amadeus for the first in a very long time today (and coincidentally, about an hour later I heard Rock Me Amadeus on the radio for the first in a very long time). I was, of course, checking out things horsey in various scenes.
Toward the end, when Stanzie is being driven back to the dying Wolfie’s home, her carriage is being pulled by a team of four. One of the two front horses–I believe the horse on the front left–is simultaneously being ridden (and it appeared the rider was at least partially holding the reins of the horse next to them) while also pulling the carriage. I couldn’t get a good look-see to determine if there as a saddle with the harness, or what.
I know just a teensy weensy bit about driving, but have never seen this sort of thing. When and why was (is? does it still happen?) this sort of thing done?