Is the Petronas Tower 1 the biggest building?

As of my last update, the Petronas Towers in Kuala Lumpur, Malaysia, were once the tallest buildings in the world from 1998 until 2004. However, they are not currently the tallest; that title belongs to the Burj Khalifa in Dubai, which stands significantly taller. The Petronas Towers remain one of the tallest twin towers globally and are iconic for their unique architectural design.