San Francisco's tallest skyscraper, designed by US firm Pelli Clarke Pelli Architects, has completed as part of a major development in the city's Downtown area.
Reaching 1,070 feet (326 metres) and 61 storeys tall, the Salesforce Tower celebrated its official opening on 8 January 2018 and will become the headquarters of cloud computing company Salesforce.

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Although interior fit-outs are still required before employees can move into its 1,400,000 square feet of office space, the building appears entirely finished from the outside.
The glass-wrapped skyscraper has curved corners and a form that gradually tapers towards its top, described by Pelli Clarke Pelli as "the simple, timeless form of the obelisk". Louvres criss-cross the facades to create a grid, shading the windows from direct sunlight.
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"The walls rise past the top floor to form a transparent crown that appears to dissolve into the sky," said the firm. "Carved into the tower top is a vertical facet that will be lit at night."
Salesforce Tower eclipsed the height of the Transamerica Pyramid, which at 853 feet (260 metres) held the title of the city's tallest since it completed in 1972.

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However, it misses out to Los Angeles' W...