Here's a look at the 9 biggest skyscrapers due to complete in the next 12 months, including the world's tallest office tower, a building topped by a huge diamond and a structure designed to resemble ship sails.

1. Ping An Finance Center, China, by Kohn Pedersen Fox

The tallest building completing in 2016 is a 599-metre tower in Shenzhen by US firm Kohn Pedersen Fox (KPF). Once complete, it will steal the title of world's tallest office building from One World Trade Center in New York. It will also be the fourth tallest building on earth.
The project had to be temporarily halted in 2013 when it was discovered that concrete made with unprocessed sea sand had been used in the construction, putting the building at risk of collapse.
Featuring a facade of four chevron-shaped stone verticals, it will house more than 100 floors of offices and five levels of shops.
2. Goldin Finance 117, China, by P&T Group

A diamond-like form will top this 597-metre-high skyscraper due to complete this year in Tianjin, China.
Designed by Chinese firm P&T Group, Goldin Finance 117 was originally planned with a fin-like shape at its summit, but this was later replaced with the faceted glass. The tower will house both offices and a hotel.

3. Lotte World Tower, Korea, by Kohn Pedersen Fox

The Lotte World Tower near Seoul is set to become the tallest structure on the Korean peninsula this year, surpassing the current title holder ? the Northeast Asia Trade Tower in In...