Our quiet apartment, renovated last summer, is close to the famous rue Montorgueil.
It is 50 m2 large in a nice and safe 18th century building on the 3rd floor, with no lift but easy stairs.
You'll walk to most spots (Le Louvre 15mn, Pompidou Center 10 mn, Musée Grevin 8mn, Notre-Dame 20mn etc...)
It is also very close (2 to 3mn) to 4 different Metro lines (3, 4, 8, 9) which will directly bring you to all the other spots like the Eiffel Tower in less than 15mn.
Feel free to ask me questions.