Masjid al-Haram: World’s Most Expensive Building with Costs Reaching $100 Billion

The Masjid al-Haram in Mecca, Saudi Arabia, has been declared the world’s most expensive building, with total costs now estimated at $100 billion. This iconic mosque, the holiest site in Islam, has undergone extensive renovations and expansions to accommodate millions of annual pilgrims. The investment aims to enhance facilities and ensure a safe, comfortable experience for worshippers, reaffirming the site’s significance as a center of faith and unity for Muslims worldwide.