A skyscraper in Sydney, Australia that was constructed around the shell of another structure was awarded World Building of the Year at the World Architecture Festival in Lisbon, Portugal last week.
The prize is the latest honour for Quay Quarter Tower, which has been dubbed the world's first "upcycled skyscraper" and a more sustainable solution to high-rise construction.
The tower, which opened earlier this year, was based on AMP Centre that opened in 1976 and had reached the end of its viable life.
The AMP Centre at 50 Bridge Street, about halfway between the famous Opera House and the Harbour Bridge, was once Sydney's tallest building.
Its owner, AMP Capital, wanted a more eye-catching and energy-efficient building that could meet the needs of tenants in the 21st century, but was also concerned about the environmental impact of demolishing the structure.
It decided to hold an architectural competition with a sustainable brief, challenging architects to build a new skyscraper without knocking down the existing tower.
The 676 foot, 49-storey Quay Quarter Tower was announced as the winning design in 2014. It was designed by Danish architectural firm 3XN, which collaborated collaboration with Sydney-based firm BVN.
Construction began in early 2018 and was completed earlier this year. Take a look at the building here.