A very beatiful chruch that was located up on the hill. To get there, you can take Metro and then you can walk up, which is alot of steps, or you can also take the funicular ride up for only 2 euro. Once you are up, you can also go inside the church, which was so beautiful. I went inside when there was a mass, so alot of people joined it. If you want, you can also hike to the dome, where you will get an amazing view of Paris as well as the Eiffel tower