The massive Porte de Soissons is located to the southwest of the medieval city, and was built in the early 13th century when the fortifications were rebuilt. Formerly known as Soibert or Porte Saint-Martin, its rear section (demolished in 1895) offers a cross-sectional view of this type of defensive system: a vaulted room on the upper floor, giving access to the portcullis and the machicolation. Not to be missed is the strange leaning tower nearby, known as Dame Eve, perhaps in homage to the person who contributed financially to the rebuilding of the ramparts.