Sauerweid, Alexander – The staff officer of the Life Guards Dragoon Regiment Hermitage ~ Part 05

The picture has something of this: cavalry, people, seated, military, weapon, man, wear, sword, equestrian, lid, mammal, soldier, uniform, gun, army, rider.
Perhaps it’s a painting of a man riding on the back of a black horse with a sword in his hand and a helmet on top of the horse’s back.