You have some good answers. I'd comment that if it's not in any book, it may not be a must-do, just something that's nice. The first paragraph below is a paste from another, past, post of mine:
We like gardens, so on our eighth trip to Paris, we went to the Parc Floral, when it's appropriate to include Chateau de Vincennes (which is otherwise, not a must-see.) Walking to the Parc from the Chateau, we passed over an empty traffic triangle with a long inscription in French on the stone. It seems there was a German invaders war monument put up there during World War I-they got really close to Paris. The French tore it down and put up a French monument after the war, so when Paris was occupied by the Germans again, the occupiers tore down the French monument and rebuilt theirs. When Parisians tore down the second German monument, they decided to leave the pedestal empty, as a remembrance of what happened!
You have good museum list. I'll mention that the Louvre Arts Decoratifs collection, separate admission, and fashion collection, up Rivoli from the big museum is just excellent, especially if you are tired of canvases on the wall.
This is a crowded time of year, but are you taking the train to Giverny? Chateau Chantilly is still on my list.
You are not going to finish all the "book" visits in your two weeks! And it is likely to be very hot, slowing you down.
