Twenty years ago, a somewhat crazy project was born: to create the largest encyclopedia in the world, accessible free of charge that everyone could enrich and improve.

It's Wikipedia!

She is celebrating her birthday this month.

20 years old, then.

Today it is one of the most visited sites on the planet: 500 million unique visitors per month!

It is one of the most popular, and yet one of the most misunderstood.

How does Wikipedia work?

What are its rules?

Who runs it?

To answer these questions, Philippe Vandel receives Rémi Mathis, historian, curator at the National Library of France and former president of Wikipedia France.

Guest (s): Rémi Mathis, Wikipedian since 2003 and curator at the BNF (he publishes "Wikipedia, Behind the scenes of the largest encyclopedia in the world" at First Editions)