its 200 m curtain wall is the first example of double glass façade ever realized in Italy.
See www.ivreacittaindustriale.it

Bauhaus building in Dessau: "In the building design, Gropius developed ideas that he had already applied at the construction of the Fagus Factory which he built with Adolf Meyer before the first World War. The glas facade or curtain wall is the central design element which defines the buildings aesthetics." (see link)
See architectuul.com

Cité de Refuge: "The first component had two facades of glass curtain-walls projecting beyond the concrete floors."
See www.fondationlecorbusier.fr

"The site is one of the icons of 20th-century industrial architecture, comprising a complex of factories, with façades consisting essentially of steel and glass, making large-scale use of the curtain wall principle." (OUV)

It is a large, curved glass wall that spans the width of the building
See g.co

The exterior skin (the copper sheets that form the statue's shape) is not load-bearing. Instead, it is supported by an internal steel framework designed by Gustave Eiffel. This innovative design made the statue both lightweight and structurally sound. (wiki, Gemini)

"It exemplifies the innovation of the curtain wall, which optimises both luminosity and lightness." (OUV)