Josef Koudelka (1938) The Black Triangle. Czech Republic, 1991. Silver print (1999), signed, dedicated and dated in ink in the lower margin. Image : 15.5 x 46.5 cm - Sheet : 30.5 x 50.5 cm - frame Bibliography - Josef Koudelka, The Black Triangle: The Foothills of the Ore Mountains, Prague, Vesmir, 1994, n. p. - Josef Koudelka, Chaos, Paris, Nathan-Delpire, 1999, pp. 94-95.