Then a Harvard student, he is now the leader of the largest social-networking site in the world and has even turned his sights toward public policy.

Facebook, too, has changed, from a rocky IPO launch in 2012 and uncertain advertising possibilities to surging revenue in its most recent quarter based on growing ad sales. And as the social network has changed so have the ways in which much of the world communicates.

Take a look at some then-and-now images and statistics that show how far Facebook has come since February 2004.

Usership

Then: 1 million (December 2004)
Now: 1.23 billion

Headquarters

Top: Kirkland House at Harvard, where Zuckerberg launched Facebook in 2004. Bottom: Facebook is building a 394-unit housing community next to its headquarters in Menlo Park, Calif. (Elize Amendola/Associated Press; Jeff Chiu/Associated Press)

Strongest User Growth

Then: College students
Now: Age 65 and older

Logo

Top: Facebook’s login page at the time of its launch in February 2004. Bottom: Current Facebook login page.