Does Paris shut down for Easter?

My husband and I are going to Paris for my spring break, to visit my sister (who is studying there this semester) and to spend some time in La Belle France. I am concerned, however, that France, and Paris specifically, might close up to a certain extant in the week following Easter (when we could go). I was there over Christmas when I was in college, and the city virtually shut down – it was worse than August. This won’t change our travel plans too much, but I wanted to be prepared. So for all the fluther francophiles, will the city of lights be dark for a few days, or will things be open and available?