Façade work will begin next month at the One World Trade Center in New York, US. The new centre was designed by US-based Skidmore, Owings and Merrill.
Stainless steel and glass panels will clad the 541m² skyscraper, formerly known as the Freedom Tower.
The $3.2bn tower features eight triangles of glass and steel, and the façade will form an octagon shape halfway up the building.
The kaleidoscope-style surface will change throughout the day as light and weather conditions change, said the architect.
When complete the building will be the tallest in the city and is scheduled to open in 2013, according to dnainfo.com.
The glass panels are provided by manufacturer Viracon and the steel pieces by Benson Industries of Portland.