From the Getty Center website:
"For nearly 50 years, Bernd and Hilla Becher photographed the industrial architecture of western Europe. Using a large-format camera loaded with five-by-seven-inch sheet film, they created an archive of the basic forms that inform our understanding of the industrial era. Rendered with absolute precision in the palette of cool grays characteristic of medium-contrast gelatin silver prints, each structure is centered against a cloudless sky, filling the picture frame. Their choice to limit decisions, effectively employing a "nonstyle"—which, ironically, became an immediately recognizable style—demonstrates the role the Bechers' work has played in bridging the gap between photography as document and photography as art in the second half of the 20th century."
Online book of Becher work
Bernd and Hilla Becher, large, steel storage tank, circa 1960s, silver gelatin print
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Bernd and Hilla Becher, "Framework houses, area", collection Ydessa Hendeles, Art Foundation, 1989,Tipologie, Biennale de Venise, 1990.
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Bernd and Hilla Becher, Water Towers, France and Germany, German, 1968 - 1972, Gelatin silver prints
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