This painting. "Skaters on the Amstel" by Arent Arentsz which dates from the 1620s, was one that stopped me dead in my tracks. Showing skaters on the frozen river it also portrays two well-dressed dudes playing "kolf" which looks a lot like golf mixed with hockey. People have been looking for ways to amuse themselves forever, I guess.
Note on the weather: the local authorities just took down the boards for the outdoor hockey rinks in our neighborhood. This year was a pretty good one for playing the game outside, and the rinks were in use until just a few days ago.