Just returned from Paris and wanted to give feedback on how to navigate in wheelchair. Wheelchair friendly sites were St Chapelle but only Mon thru Fri. They have elevator that will get you to second level which is quite impressive but only operates during the week. Trying to use entry for disabled was confusing, they instruct you to go to entry 4 who sends you to secure entry for parliament and they have no idea, bottom line we just went through regular line then someone escorted us to elevator. If you are lucky to get thru secured area the lift is 1st building on right.
Pantheon has no accommodations to get to crypt but main floor is impressive. Notre Dame tower forget it- 400 plus steps but cathedral accessible There is an elevator at Arc de triumphe but only takes you 2/3 way up still 40 plus steps to viewing platform.
All the museums have special entries and elevators. Make sure you get maps when using these enty because sometimes bypass main entry where you pick up plans. Versailles was interesting- they do have elevator to get upstairs but so crowded almost impossible to navigate through crowds inside the palace. Large, uneven cobblestones to get there makes pushing wheelchair very difficult. But the grounds itself were so worth it. We used Petite train to get us out to trianons
Most metro stations have elevators but occasionally non operational so we mostly used the bus. transportation wonderful in the city- if staying a week get navigo decouverte pass.(20 euro for the week of unlimited travel on bus and metro in central Paris). Trying to find bus map difficult so used ratp.fr to map out routes and when they tell which bus went to plan de lignes and printed out bus routes with where they stopped before went to paris so had my own bus map
paris with a wheel chair is possible with just a little planning