The houses on big streets in Paris are very interesting: You have to enter a code to get through the front door, then you're standing in a big square backyard which has more doors with codes for the separate houses. If you look up, it's quite impressive :) One of the flats was ours for the time being :)
Good POV, I have stayed in an apartment in Paris, unfortunately you had to go down an outside corridor for the toilet, then it was just a hole in the ground.
