The first part of the world's second-tallest building, the Mecca Royal Clock Tower in Saudi Arabia, will be unveiled in June.
The $3bn building features two parts; one made of a 662m concrete structure and the other made of a 155m crescent-topped metal spire.
It will house a 45m-wide and 43m-tall clock on all four sides of the tower.
The German-made clock, touted to be the largest in the world, will begin operations in July.
The seven-storey hotel complex, also known as Abraj al-Bayt Towers, comprises 3,000 rooms and suites.
The structure will be 11m shorter than Dubai's Burj Khalifa and it's concrete section will be taller than the current second-tallest building in the world, the 508m Taipei 101 in Taiwan.