AD Classics: Woolworth Building,View of Woolworth Building and surrounding buildings (ca. 1913), via <a href='https://creativecommons.org/licenses/by-sa/3.0/'>Wikimedia</a> Commons

AD Classics: Woolworth Building,Blue and yellow accents. Image © Aaron Sylvan

AD Classics: Woolworth Building,Stairs in the rear of the lobby. Image © Aaron Sylvan

AD Classics: Woolworth Building,Woolworth Building under construction, circa 1912. Image Courtesy of Flickr Commons Project

AD Classics: Woolworth Building,Typical upper level plan. Image © Penn State Libraries Pictures Collection

AD Classics: Woolworth Building,© Flickr user Bob Jagendorf

AD Classics: Woolworth Building,Vertical emphasis and ornate spandrel panels. Image © Aaron Sylvan

AD Classics: Woolworth Building,© Flickr user Epicharmus

AD Classics: Woolworth Building,© Aaron Sylvan

AD Classics: Woolworth Building,Exterior detail. Image © Aaron Sylvan

AD Classics: Woolworth Building,Exterior detail. Image © Aaron Sylvan

AD Classics: Woolworth Building,Exterior detail. Image © Flickr user Timmy Caldwell

AD Classics: Woolworth Building,Night view of tower. Image © Aaron Sylvan

AD Classics: Woolworth Building,© Flickr user Alan Miles NYC

AD Classics: Woolworth Building,Exterior view during One World Trade Center construction. Image © Bob Estremera

AD Classics: Woolworth Building,Night view through trees. Image © Aaron Sylvan

AD Classics: Woolworth Building,Building signage. Image © Bob Estremera

AD Classics: Woolworth Building,© Aaron Sylvan

AD Classics: Woolworth Building,Lobby mosaic . Image © Aaron Sylvan

AD Classics: Woolworth Building,View of lobby skylight. Image © Bob Estremera

AD Classics: Woolworth Building,© Bob Estremera

AD Classics: Woolworth Building,View in lobby. Image © Bob Estremera

AD Classics: Woolworth Building,View into lobby. Image © Bob Estremera

AD Classics: Woolworth Building,View of lobby ceiling. Image © Bob Estremera

AD Classics: Woolworth Building,Elevator corridor detail. Image © Bob Estremera

AD Classics: Woolworth Building,Door to the safe deposit vault. Image © Bob Estremera

AD Classics: Woolworth Building,© Bob Estremera

AD Classics: Woolworth Building,© Bob Estremera

AD Classics: Woolworth Building,Sculptural lobby element. Image © Bob Estremera

AD Classics: Woolworth Building,Sculptural lobby element. Image © Bob Estremera

AD Classics: Woolworth Building,Second basement level. Image © Penn State Libraries Pictures Collection

AD Classics: Woolworth Building,First basement level. Image © Penn State Libraries Pictures Collection

AD Classics: Woolworth Building,Lobby level. Image © Penn State Libraries Pictures Collection

AD Classics: Woolworth Building,Wind bracing diagram. Image © Drawings published in American Architect, 103

AD Classics: Woolworth Building,Grillage plan. Image © Drawings published in American Architect, 103

AD Classics: Woolworth Building / Cass Gilbert

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AD Classics: Woolworth Building / Cass Gilbert