Le Drapeau noir [The Black Flag] | National Galleries of Scotland
▻https://www.nationalgalleries.org/art-and-artists/691/le-drapeau-noir-black-flag
The Pain In Spain - TIME
▻http://content.time.com/time/world/article/0,8599,2056137,00.html
Although the best-known painting of the war, Picasso’s Guernica, remains at home in the Reina Sofia Art Center in Madrid, there are other powerful reminders of the 1937 attack on the Basque town.
...
René Magritte’s The Black Flag, a dark painting depicting a sky full of strange and sinister forms, gives “a foretaste of the terror that would come from flying machines,” Magritte later wrote.