Museums and Monuments Card

You can purchase a Museums and Monuments card at the Paris Tourist Office, which will be valid for unlimited visits and will give you priority access to 65 locations in Paris. You can either puchase it at the main Paris Tourist Office (127, avenue des Champs-Elysées), or in several other locations such as the Office of Tourism reception offices in Paris (inside train stations), at the Eiffel Tower, and in the major Métro stations. You can also get it at t any of the 65 attractions available. Cards are valid for either one, three, or five consecutive days.

prices:

- 1-day pass : 18 €
- 3-day pass (consecutive days) : 36 €
- 5-day pass (consecutive days) : 54 €
 

Though buying this card "obliges" you to run from museums to museums, whereas having a rest in a café or shopping is also a way to enjoy Paris...

I recommend you to buy this card only if you are on a very tight schedule, and want to visit ... everything! Otherwise this card will turn out to be very expensive compared to the normal price you would pay to enter the Louvre, the Orsay Museum...

In my opinion the main advantage of this card is to save you time, since you won't have to queue to enter inside the museum. Up to you to know how much you are ready to pay for that privilege :-)