There are populous buildings in this anthropogenic dwelling place, but not all of them are expensively built.
There are some buildings in this world that are expensively built to the extent that you would get amazed when told about their estimated amount.
Honestly, here’s the most expensive building worldwide. The great Mosque of Mecca. The great Mosque of Mecca is also known as Masjid al-Haram, is the most expensive building worldwide by a massive distance.
Indeed, it’s estimated that it has now cost $100 billion in today’s money.
The great Mosque of Mecca is located in the big city of Mecca, it surrounds the Kaaba, the place which Muslims worldwide turn towards while offering daily prayers and is Islam’s holiest geographical place in the world.