Oh, I really miss something here for you. Tour Montparnasse. The building with the most stunning view over Paris!
For @lackofcolor you really should have added the most luxurious department store LaFayette on Boulevard Haussman to your list. And also for you to photograph some architecture because the department store certainly has that.
The time I was in Paris, I also found Montmartre an absolute must, just like the Sacre Coeur. There were certainly many more highlights, such as Notre Dame (glad I saw it then) ... but in fact Paris is a city that simply has TOO MUCH to do in three days.
Ha, funny you propose that one! It was actually on the list but thought it wouldn't be something we would have time for.
Montmartre is indeed a beautiful place, but it was also the only one that would be taking too much time to go back and forth, with the little time we had (and most of the things we wanted to see were more central). Apparently, it seems to be pretty crowded with scams and thieves, so didn't really bother to go -again- and would safe @lackofcolor the trouble for any additional unnecessary stress.
Paris is beautiful!