Joshua 2:15

Then she let them down by a cord through the window: for her house was upon the town wall, and she dwelt upon the wall.

Her house was upon the town wall. In many Oriental cities houses are built on the walls with overhanging windows; in others the town wall forms the back wall of the house, so that the window opens into the country. Rahab's was probably of this latter description, and the cord or rope sufficiently strong to bear the weight of a man.