All experimental French military vehicles where development has been abandoned are kept here. The vast storage rooms are only accessible to special guests. There is an enormous library, archiving the records of the history of French armor. The museum was renamed after General Jean Baptiste Eugène Estienne, the creator of the French tank arm. The previous name Musée des Blindés directly translates to "Museum of Armoured Vehicles".
While in France, you might want to see these other museums as well
Other tank museums of note:
Military museum Lešany - Czech Republic
Parola Tank Museum - Finland
German Tank Museum - Germany
Yad La-Shiryon - Israel
Kubinka Tank Museum - Russia
The Tank Museum - United Kingdom
General George Patton Museum of Leadership - United States