The Hague was host to the 2020 Invictus Games (English Wikipedia) last month. Like so many things, it was postponed for two years due to Covid-19. The Invictus Games are for injured, wounded or ill military personnel (active or veteran). It ran from April 16 through April 2022 with about 500 athletes from 17 countries competing.
I noticed today that they were taking down the Invictus Games flags from the Buitenhof:

Here it is from another angle, where you can see the provincial flags better:

In total there are 12 flags for the Dutch provinces and 1 flag for The Hague. In the background is the outside of the Binnenhof (English Wikipedia). It is currently closed for renovation. At the moment they are hoping to finishing the renovations by the end of 2026. We’ll see…