De Wallen or De Walletjes  is the largest and best known red-light district in Amsterdam and a major tourist attraction. It is located in the heart of the oldest part of the city (Amsterdam-Centrum), covering several blocks south of the church Oude Kerk and crossed by several canals. De Wallen consists of a network of alleys containing approximately three hundred tiny one-room cabins rented by prostitutes who offer their sexual services from behind a window or glass door, typically illuminated with red lights. The area also has a number of sex shops, sex theatres, peep shows, a sex museum, a cannabis museum, and a number of coffee shops that sell marijuana. 26 coffeeshops in the De Wallen area will have to close their doors between 1 September 2012 and 31 August 2015.[1] As part of new restrictions which came into force in 2012, a Dutch judge ruled tourists can now legally be banned from entering cannabis cafes