aerial view of medieval ruined montlhéry castle controlling the paris - orleans road

architecture illumination destination iledefrance illuminated battlement department pentagonal defensive landscape montlhery nightfall staircase touristic undefined building fortress historic century chacent ancient curtain defense essonne evening hilltop history tourism aerial castle chapel donjon essone towers france french gothic ground sunset travel color night tower trees walls 11th teau five plan moat view day ile old top