Look up: Historic Hallidie Building crumbling

The Hallidie Building at 130 Sutter St. features a 7-story glass wall that was remarkable when the building was constructed in 1918.

The building was the first American building to feature glass curtain walls. Instead of a heavy stone facade common at the time, seven-stories of glass walls allowed plenty of light into the seven-building. The design was borrowed and repeated by countless architects of modern skyscrapers.

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