Unless you’re the most passionate Microsoft bigot who travels only with Bing, you’ve seen the Google Doodles.

In honor of milestone anniversaries, cultural events and extraordinary people, Google incorporates referential design elements into its front page logo. The doodle on the left appeared on July 22, 2011 in honor of Alexander Calder’s 113th birthday. It responded to a mouse drag by moving like a mobile.

On a typical day, these doodles can be seen by hundreds of millions of people. That makes them among the most viewed works of art in the world. For comparison, Musée du Louvre, the world’s most visited museum, receives about 15,000 visitors per day.

Did you ever wonder who was behind the Google doodles? If you have, then you’re in luck. The BBC provides a nice glimpse into the Google team of doodlers.