Last year, DailyMotion partnership manager Dan Milano posted this amazing GIF showing the construction of One World Trade Center, formerly known as the Freedom Tower, from Ground Zero to 1,776 feet.
On Monday, the state-of-the-art building is welcoming its first tenant, the publisher Condé Nast.
Check out all 40,000 tons of structural steel being put together:
NOW: Read The Incredible Story Of The Wall Street CEO Who Survived And Rebuilt His Firm After 9/11