These sprawling structures accommodate numerous shops within standardly-constructed units that were traditionally closed and opened with two wooden slats (one on the bottom and one on top). They also have their own gates and were traditionally closed off at night.[15] One example of a kissaria today is the series of four parallel lanes (running roughly northwest to southeast), divided by another lane down their middle, which is located between the two main streets that fork off the northern end of Souk Semmarine, at heart of the souks.