A Portrait Of Alfonso III On Horseback Josep Cusachs i Cusachs (1851-1908)

The picture has something of this: cavalry, seated, mammal, people, military, wear, man, weapon, army, two, soldier, equestrian, lid, uniform, gun, war, vintage.
Perhaps it’s a painting of a man in uniform sitting on top of a horse in a grassy area with trees in the background and a fence in the foreground.