I'm thinking of a celebration.
By that, I mean some sort of festival, an important event or occasion, by which humans gather to engage in enjoyable, typically social, activity.
Rules:
You have 11 questions (in total, not each).
They must all be yes/no questions.
First correct answer closes the...
Actually, the only thing that wasn't stolen at the Louvre's Apollo Gallery is the Regent Diamond, figure no one would take it because something to do with a curse.